ZDM's page

Some of the DCs for magic items are worthless. They need to based more on the wearer/users class level or something rather then a fixed number.
Example: Amulet of proof against detection/Location. 35000gp. DC to beat the item is 19. Lets assume you spend 1/4 of your wealth on buying one = must be ~14th level to afford. Okay, now look at what you bought. Lets assume the 14th level villian is scrying on you: He needs to roll a 5 to get through? Even a 7th level wizard, who can just now cast scry, has 45% chance of getting through.

Another example would be any major artifact with a set DC. The Orb of the Copper dragon can cast suggestion, DC 17 negates. This is an artifact? 3.0/3.5 neutered these things.

This spell should be 5th level. Not available in a potion or a wand. The reasoning is parties pitch in and buy a wand of this early on in a campaign and terrain is meaningless. Make terrain mean something again. I just assume see this spell removed completely.
Now I know everyone will say but compare the power of fly to other 5th level spells. Good argument, but sometimes I think mechanics should be sacrificed in the name of getting players to come up with solutions other than "5 more charges off the fly wand". Boring. Look at how much even high-level adventures emphasize terrain. Not only that, it just gives way too much advantage in an outdoor combat (or even a high celinged room) for a 3rd level spell.