I dunno ...
You still have bonus action to heal, you mentioned absolute talisman that automaticly heals you if your HP gets too low, there are boots of aid and comfort adding any heal you receive +3 temp HP, while raging you still halves any incoming non-magical damage, and Barbarian have lots and lots and lots of HP ...
I mean yeah "up to 9dmg" may seem like a lot ... but somehow it dont to me in context of the rest.
