Okay, uses per day... and what did you replace it with?
I'm looking not just for a statement of "this is my opinion", but your reasoning and the mechanics too. Please be a little more forthcoming with details. Otherwise, you're just effectively making random comments to no effect or purpose.
For example, the Erudite ability could also be easily reconstructed as an ACF, instead of a prestige or a replacement class. My impression of the class was that it was designed to bring the know-it-all class feature of the wizard into psionics. and apparently they wanted some sort of limits on the powers per day, same as a wizard is limited (normally) to level slots per day and must memorize (again, normally) in advance.
However, as psionics have no slots, and they didn't want to weaken the class via limiting the power points, they decided instead to use a unique mechanic for effectively limiting the number of different powers usable per day. in other words, the unique powers per day class feature is what they came up with to mimic the wizard's limited level slots per day and memorization requirement, without being exactly the same - given that one of the core mechanics of psionics is that you can pick from any power known whenever.