Let me first say that I agree, in principle, with an increase in price for feat changes. However, a 10-fold increase was a bit brash, to say the least. In this game is not unusual for new rules every mod, new enhancements, etc. it should be a bit easier to swap feats to accommodate for such changes. I don't really understand it. You don't offer, at the moment, full re-specialization, yet you are making changing feats as difficult as you possibly can. Even with new imperfect shards dropping quite a bit, you still need a shipload of those to change one feat. Changing feats is as close to "re-spec" as we have and while I don't think it should be free or as cheap and easy as it was, the severe price jump cought a few of my toons completely off guard.
Godspeed.