Only 3 if you take Awakened Blade to 10. Psion 4 / initiator 1 have IL of 3, allowing him to select 2nd level maneuvers. With a trait from PoW2, Psion 4 / initiator 1 have IL of 5. IMO it's solid blue bordering on purple.
Assimilate - it looks like you have to kill a creature with 9 more HD than you to get +4 to all ability scores.
Metamind - "or you’ll be forgoing 9th level powers without the psionic knack trait".
Latest ruling is that psionic knack doesn't have anything to do with maximum level of powers known.
Shape the Shade - pounce costs 3 points now. Also not clear how base form requirement interacts with this power.
Power Resistance power's cap is at least 36 with ioun stone and overchannel.