I don't think HP and def matters that much with Gathering. You shouldn't be getting into fights. If there are mobs around you should be using stealth.

GP is getting a trait that increases the speed it regenerates at 61. No real indication if the start point is changing though. Would be nice if it scaled up a bit or just started at 0 or max like battle classes depending on if you were in a sanctuary or not.

Honestly they might cut Deep Vigor if it is useless. There are a number of rather useless abilities which could probably be culled and replaced with something more interesting.

Honestly we have very little information to go on as far as Gatherers and Crafters go. They weren't even mentioned in the Media Tour Live letter and not much before that. Personally I would love to find out more about what endgame gearing for the classes will be because it really effects how I want to target levelling my crafters and gatherers. I am not worried. Its just we don't have much to go on.