Thought I'd record a few of the suggestions and create a sandbox for discussion and further suggestions.
Also for the record I'd like to suggest giving Subterfuge Single Through at Lv5. No really.
Anyway:
-Doubles at Lv6. Helps make it slightly less shit at high level compared to warrior.
-Brawling. Given it's a tree that gives weapon skills like Warrior and Subterfuge, it seems odd for it not to offer brawling when they do; unarmed combat would seem in keeping with the flavour of Wilderness.
-Some kind of resilience skill (eg bleeds out slower?)
-Some manner of combat status effects.
-Ability to improvise melee weaponry given 60 seconds out of combat and an appropriate physrep?
-Ability at high-level camouflage to hide an unresisting other person provided they don't move? (useful for eg hiding a body, or an unconscious friend so they don't get stabbed up)
-Double (or otherwise ramp up) the Targeteer calls.
-Allow to use any two-handed weapon, not just staves. Come on, Greataxe ranger is just cool. Also reduces physrep pressure.
Further suggestions, and discussion?