Hmmmm.... I'll check out those cantrips, but clerics get some Divine Channeling (or whatever it's called nowadays) boosts with a short rest, and the Wizard gets Arcane Recovery.
One of my favorite things about 5E is that everyone seems to be jealous of what other classes get. I think I've seen players of every single spellcasting class complain about how much better other class's spell lists are. (And that includes a bard who can pick and choose from everywhere.)
I'm running a high-level Fey warlock. We converted our campaign from 3.5 to 5E, in part because we had hit the point in 3.5 where players either died instantly or won fights without every being challenged. My warlock obviously took a big step down in power - I know longer was constantly flying and invisible and dropping maximized empowered chained eldritch blasts on people.
But in return, suddenly, I find each round I am actually making choices. Sure, I only have 3 spell slots per rest. But I also have a couple actions from being a fey warlock - like frightening nearby enemies, or trapping a foe in an illusory world that I entirely control. And of my spells, I have tough choices to make - do I focus on buffing and cast Greater Invis on our Rogue? Do I just try to shut down enemies by Banishing a few to another plane or ensaring them in Confusion? Do I polymorph myself into a T-Rex and wade into the fight? Or do I just hex an enemy and unload Eldritch Blasts into them for damage? Or do I instead use those Eldritch Blasts to knock an enemy away so it has to waste its next turn running back to the fight? Or maybe, before the fight, I summoned up a spirit Mammoth and I'm riding it into battle.
The power level may have gone down, but the fights are more interesting. And I'm sure that is true for other casters, who also have plenty of versatility of their own. Still, the Warlock has felt pretty good at being able to bring big effects to each fight, and worst case, being able to simply deal quite a bit of damage if I run out of all my other tricks. While allso having a host of interesting and flavorful abilities, between the Pact and the Invocations.