#1 - July 26, 2017, 8:57 a.m.
2 Piece: Quite smooth from a playstyle perspective.It's quite similar to IFTK in providing an 8 second buff. Can be maintained regularly, but I'd suggest that it be triggered by Warbreaker as well, just as IFTK does.
4 Piece: Broken on PTR as of July 26, 2AM PST. Might change in the future.
The 4P makes me think of a reverse Focused Rage where MS is the one buffing the filler. My only concern is that a single stack of the buff from MS is enough of a damage increase to Slam/WW, which is mostly a tuning issue. The 4P fits seamlessly into the the Arms rotation without making me go out of my way to cast anything extra.
Fury:
2 Piece: The tooltip seems wrong, it's currently doing 10% of Rampage's dmg in bleed form instead of 30%.
It's effect screams the Valarjar Berserker and Soul of the Battlelord. A simple passive that could be quite powerful.
4 Piece: The damage multiplier is broken right now. Though the tooltip says 0% buff to next Rampage after casting BC, it's several hundred percent. With that being said, the damage from Rampage would need to be enough for us to recover from the loss of CoF, which means less overall casts of BC.
