That coin purse is a recipe for disaster- the players, if they're not all that wise, might destroy an important or very valuable item. The rest of the items are flavorful, but the envy glasses and sloth watch seem completely useless for an active adventuring party. I think some items will see much more use than others if you keep them how they currently are.
Could you tell us the party composition and which ones embody which sins? That would be very helpful in determining what sort of powers would be useful for them.
From your list it is unclear if the items are all supposed to be slight buffs, or slight debuts to your PCs. Greed is to strong in comparison to the rest of the items. Here are some Ideas and reworks, (mind that item level should not be 1:1 with PC level:
Greed
level one; This coin purse causes any vendor who touches this gold during a purchase of their goods to come under the effects of a fool's gold spell equal to your PC's level.
Level two; This coin purse allows you to find gold pieces as per the locate object spell, however you do not need to be familiar or clearly visualize the gold pieces in order to detect them.
Level three; This coin purse generates one gold piece per day.
Sloth
level one; This pocket watch can be set for a number of round equal to the PC's level as a standard action, while the timer is going the PC comes under the effect of a slow spell and delay poison spell. This can only be done once a day.
level two; in addition to the previously mentioned effects the PC comes under the effect of Martyr's Bargain and deadly juggernaut spells.
level three; The PC heals as per the heal spell after the timer has runout and the previously mentioned effects have expired.
Gluttony
level one; this tea pot boils liquids into its base parts. Potions can be used to gain tea and return a spell slot to the caster that prepared the potion. The tea pot may only be used this way once a day.
level two; if a potion is broken down as mentioned in level one, anyone who drinks the tea is treated though as if they had just eaten a goodberry from the gooseberry spell. The tea pot creates enough tea for seven people.
level three; When drinking the tea created from breaking down a potion all drinkers of the tea come under the effects of a hero's feast spell.
Envy
level one; while wearing these glasses the wear and all creatures within ten feat are blinded.
level two; the wearer of these glasses gets the blind fight feat while wearing them.
level three; the wear of these glasses gets the blinded blade style feat and the improved blind fight feat while wear these glasses
Pride
level one; this set of ten rings allow for one person to perfectly manipulate another person's hand from 60ft away. These two characters must be wearing five rings on the same sided hand (i.e. two pairs of five rings on both characters right hands)
level two; a spllcaster can use somatic components of the other players hands to cast spells, this allows the wizard to use silent spell to cast a spell from the location of their ringed partner. You may only use the rings to do this once a day.
level three; on your allies a turn your ally may attempt a DC 20 + spell level use magic device check to cast a spell you know if you are a spellcaster
Lust
level one; this mirror allows anyone who looks in it to come under a charm person spell with the original caster being the owner of the mirror. the mirror uses its owner's level for all spell effects.
level two; the owner of the mirror may use divination as per the spell once a week by consulting the mirror
level three; the mirror may be used to cast the spell magic jar. If you choose to posses a creature, a look-a-like version is trapped behind the mirror while you are in possession of its body in the real world.
Wrath
level one; this bastard sword can cut through any object without leaving a permanent mar, this does not work on any creatures or items who are capable of expressing agency.
level two; this weapon can cut shapes into objects, this leaves them open in the desired shape for two rounds, the round the items is cut in, and the round directly afterwards. If the weirder has the rage class feature, this bastard swords becomes a +2 bastard sword.
level three; This bastard sword can be used to sunder items that are unattended (not held, worn or on another creature's body). Items sundered by this item automatically break and are destroyed. If the user has the rage class feature, it becomes a +2 vicious weapon.
Here are some interesting ideas for items that build up and become pretty strong by the end of the game. enjoy!
Didn't realize walls = items, oops. Also is KO'ing walls super broken? I imagine it'd be a pain for a DM while building a dungeon, but outside of that I can't imagine it being too powerful. It was just meant to create portals in walls not strait up destroy them.
Agreed for Lust, Geas spell maybe, idk some sorta high level compulsion spell
Gluttony should be adjusted to only give tea part of the spell, insatiable doesn't seem like to big of a deal given what the effects of the tea pot do.
I feel like sloth is meant to be more focused on doing things slowly and thus more methodically, rather than just sleeping. That just sounded more fun as a player, than "hey you can take second/third watch now, without penalty". But also maybe there should be more benefits for being under the effects of a slow spell?
So one of the sins isn't represented, or one player has two sins? 7 sins and 6 players.
That party makeup is a huge surprise to me. No full arcane or full divine casters... that's gonna make the game a living hell at high levels. Maybe they plan on taking cohorts? That's a way to keep things stable, but it adds even more characters to an already bloated party.
My 2 cents.
Bard: Lust (bards are notorious seducers)
Monk: Sloth (Too lazy to fight with weapons or carry around armor :p)
Barbarian: Gluttony (Barbarians are all about feasting and drinking)
Rogue: Greed (Obviously)
Cavalier: Pride (Waving a banner around and shouting battle cries? Pretty prideful if you ask me)
Ranger: Wrath (Hatred of favored enemies)
Cleric: Envy (Wants the power of the gods)
The addition of a cleric will make things easier, since they can at least remove some debuffs. You know your group better than I do, and if you ran a 10 player game before and managed to still make it a challenge, you'll probably be fine.
Perhaps a dwarf cleric with a genocidal hate for Orcs and goblinoids?
An envy cleric, perhaps he draws power from the hydra like false god of Lamias? All the power of a god, but none of the other gods recognise her, or it.
Lamias worship Lamashtu.
If you want your cleric to be evil, I can definitely see an Undead Lord cleric of Fumeiyoshi who forces their corpse companion to constantly spout praise and belittle others around them. Might be grating on the other PCs, though. :p