I still have trouble with people comparing GPP to GSP.
GPP gives you the benefit for a "single" manifestation. It expends your focus which requires a minimum of a move action in order to regain. While a sorcerer can cast and move a psion must cast and stay (while meditating to regain his focus). With the generally shorter range of powers this can be a pretty big drawback since if the opponent wasn't felled with the first attack then he is most likely to be right on top of the manifester before the round is over.
Then the manifester has the problem of AoO.
Manifesting generates an AoO.
Meditating generates an AoO.
Moving (other than a 5 ft step) generates an AoO.
While the sorcerer gets a single AoO from casting, but since he could move after casting and more of his spells have a longer range he is much more likely to avoid the melee issue altogether.
GPP gives you the benefit for a "single" manifestation. It expends your focus which requires a minimum of a move action in order to regain. While a sorcerer can cast and move a psion must cast and stay (while meditating to regain his focus). With the generally shorter range of powers this can be a pretty big drawback since if the opponent wasn't felled with the first attack then he is most likely to be right on top of the manifester before the round is over.
Then the manifester has the problem of AoO.
Manifesting generates an AoO.
Meditating generates an AoO.
Moving (other than a 5 ft step) generates an AoO.
While the sorcerer gets a single AoO from casting, but since he could move after casting and more of his spells have a longer range he is much more likely to avoid the melee issue altogether.