It is interesting that some very ability-rich classes on Arelith receive significant updates, while the ability-starved Barbarian class remains relatively static.
The Barbarian class gets zero bonus feats, unlike almost any other, and has only three unique feats that are usable, which are also locked behind a requirement of both 20 Barbarian levels and an impairingly high Constitution score. Furthermore, these feats are only aspects of one, namely the Rage feat. The class has little to add to it besides boring damage reduction, comparable to two pieces of armor, which is significantly worse than having even just slightly higher armor class in most scenarios.
The incremental increase in physical damage is also ridiculously low when compared to classes like Weapon Master, Rogue, and many others. It only gets noticeably but not too much better, again, in the epic levels.
The alcoholic strength boost and the Tribal Path are ineffective, as the former is useless due to the soft cap and the latter lacks role-play enrichment since the tribesmen cannot be named or role-played effectively via possession.
This severely limits the class's versatility compared to others: multiclassing as a Barbarian is very ineffective; taking a dip in the class is questionable to say the least.
I recently suggested some changes, and I know that others had made suggestions last year. However, I'm curious about what other players may have to add to it all.