Thanks! I had actually been planning on starting up a Ravenloft campaign for my group, but this has me excited enough that I'm thinking of making a Zakhara campaign.Thanks for your thoughts, and enthusiasm!
The kits have been enormously popular with our playtesters - it's just another little hook that might never even come into play, but helps direct how to develop a character and anchor it to a setting. So just like with prestige classes in 3.x (which were a direct inspiration for our approach), we've found that many players choose feats and other options in anticipation of eventually filling a role defined by a kit. And the great thing is, even if they never end up taking the kit, the idea still help them flesh out their character.