I definitely think Survivalist and some form of Until-Death should be basekit for Vet and Zealot respectively.
Ogryn has at least two passives, one being able to revive teammates while taking health damage, the other being passive damage resistance (Used to be “Thick Skin”), and a third one on its way. I wouldn’t mind them replacing the first one there with “removing the movement speed penalties on heavies” they’re adding to No Stopping Me! (Replacing the effect entirely, or changing it to a small movement speed bonus while charging heavies. ) If only to spare New Ogryns the horror of reviving a veteran in fire only for them to instantly die. That can be a later down node, or added to one of the weaker middle-tree nodes. Maybe slapped onto “Feel no Pain”.
Psyker, I feel, doesn’t really need any since his only iconic if I recall was remade into a keystone, and a lot of psyker’s main mechanics are bespoke to them. Anything I can think of ventures more into “Gimmick” territory than “Essential part of class”.
I don’t think the toughness regen talents should be added. They are effectively tax nodes, and their location at the top of the tree is very much intentional.
However, I would prefer if tops of trees had more ways to bypass toughness regen. If I want to test my mettle, I would rather spend those nodes on fun stuff. The veteran tree does a great job of this.
Tangentially, fatshark NEEDS to redisplay the iconics (passives) for the classes. I think they removed them because a lot were turned into nodes, but some werent (Ogryn mainly) and they don’t want the other classes getting jealous.