I'm not seeing a lot of useful content here. I'm mostly seeing a lot of complaining.
The issue isn't the damage nerf to FoK, it's definitely the Interrupt removal. That really hurts. The most aggravating thing is removing the only reason to take a talent that's near the top of a tree. No trade off balance, and now It'll cost 20 gold (not major, just irritating) to get my talent points out of a totally useless ability. Quite frankly they should have just removed the talent and given us a free respec. The damage nerf they can sell me, it's lame, but as mentioned, it was expected. If they want the ability used less, INCREASE the friggin energy cost! Is that so hard a solution?