First, let me say that I really don't care for Psionics. Though I think the fluff is great something about it just sticks me the wrong way. As it is I like this class a lot based on the flavor value. I do however think you could either give it a full BAB progression, or up the known manuvers to make the crunch match the flavor.

On a purely flavor note, I love the though of the focus crystal perhaps having been fashioned as an elaborate Bracelet, inset peice of a bracer or into the back of the characters gloves. Then when the blade is needed it can "grow" out of the given item and form the shape becessary. :) Meh, it just sounds cool to me in my head :)