Originally Posted by
Secondwind
The problem is one of perspective. Blizzard doesn't intend for you to sit on stuff waiting for enrage to proc, or pool resources for enrage, like in the past. You're still trying to play like it's MoP fury, when what they want you to do is hit whatever your highest priority button available is at any given time. Mastery value will be plenty high, even without a 100% enrage uptime. Furious Slash isn't meant to prop up bloodthirst, but instead acts as something you can do when nothing else wants to proc right this moment. Where in the past if procs didn't go your way, you'd just wait 4 seconds and BT again, now you can use FS and be making it more likely that you get your procs next time around.
Conceptually at least the design seems fine. I can't say for sure how it feels in play because still no alpha/beta for me. But I'm interested to try it out, and having a free reliable filler for when nothing else is available is a big reason for that.