Oh, I do like the class. One of the few examples of a well-done
3PP class, from what I can see - I usually avoid buying those if I can (OBE's Witch Doctor is the only example of a
3PP class I allow, to date). I even avoid making classes myself because of how relatively complex it is (compared to races, feat trees, and paragon paths). Congrats on gettin' this published!
Anyways, you asked what I thought, and I posted the things that jumped out at me. You did say you were looking for constructive criticism!
Some other thoughts;
A Basic Attack power is a good idea. Not really necessary, but fun.
One other thing that jumped out at me was the class features other than Focus Surge and Meditate; They all grant powers. While it isn't truly necessary, every time I've seen such a feature in a
WotC class, it has said in the feature description "You gain the X power." Also, Psi Focus isn't a class feature, though it seems it should be.