It's tedious to keep the form active as well as having devour cover up synergies while in combat, but WW is fun and at least semi-competitive for damage. Currently, it's "good enough" to still play as a fun build and still feel like it's worth the spot in a group. There is some upside against moving bosses since it has no ground DoTs that you have to recast, but it highly lacks AoE damage in general. The claw change was kind of nice, but it's still giving up a lot of AoE damage to play as WW. Outside of the form, there is a damage loss due to CP being different for WW than a standard build. This along with wearing gear speced for a WW and not being in the form is about a 30-40% damage loss over non-WWs. Depending on the Dungeon/Trial/Whatever you may be forced out of WW form a few times during a run. It is also impossible to maintain at all if the group is slow enough; waiting between fights.

Personally, I'd like to see WW form be a toggled ability that sets your ultimate to 0. This avoids abuse with DK passive. Give it a 30 second cooldown on leaving the form. Either make the devour passive not automatic(so you can simply choose not to take it, which I'd highly prefer), or give devour it's own synergy key. This fixes all the problems with devour, since you don't need to do it to maintain the form, but it could still be there for the healing it gives. It also fixes the issue with severe damage loss when not in the form since you have more control over when it occurs.

For the damage loss on the PTS compared to live, just have the damage on the Berserker scale up over time. Easy fix. Solves the problem with the bleed damage being too much burst on each hit and still maintains it's current strength.

I can't speak too much about PvP even though I have tried both a DPS and a tank build. Not being able to maintain the form kind of ruins it for me. I know it's strong there, which is why it's being changed, but either way, I'd be more interested in it being balanced around a toggled form rather than as it is now.