My posts are somewhat "biased" since:
I play an orog barb and from the start on the concept I wanted to try was:
Don’t care about AC (26 at high epic lvl), don’t care about being vulnerable to magic (no save enhancement), don’t care about using magic (no rogue levels)...
just: be tough, tough, tough and hit hard!
(and I enjoy the mix of weak spots and extreme power)
Temp. HP (and later dmg-red) are mostly needed for this build and bit back is a very effective positive bonus. (most of all if your party is in trouble and you stand alone; I don’t care for PvP)
So if you would optimize this build (skill dump on rogue and special gear...) and combine it with a special play style it has the potential to be very powerful.
But without this and also cultivating its weaknesses it is far from it.
(I think that is the case for many classes/builds ->> shapechanging druids?