I think the new athletics ability "second wind" is too boring, plus one healing spell? Previously skills was used outside of combat, and it was good idea.
So what about to do: health = endurance * (3 + x*athletics), where x different from class, by example for wizard x = 0,2 for barbarian x = 0,4.
What about that survival get directly bonuses for combat, why it really should do? I think survival must help to find hidden loot and switches(not mechanics).
And please do something with moon goodlike ability "silver tide" - It is not interested to do a variety party on PotD because six moon goodlikes is obviously the best choice. I write about this here ( https://forums.obsidian.net/topic/84156-silver-tide-is-too-strong/ ) - it get about +25% endurance healing per cast, so 6 goodlikes = 18 time for silver tide, it get your party almost immortal