The core problem is their idea that charges are a bad thing and should be gone. If Enrage gives you 2 Charges of Raging Blow, and was untied from mastery everything would be fine. Enrage would happen, you'd press your two Raging Blows and be happy about your increased Rage-Gain for the time (which automaticaly leads to more damage). Right now it feels like you have a gimped CS that you try to optimize and can attempt to get every so often. I want to be first or last on the meters because I f***** up or did it right. Bad play is something one can improve. Bad luck is just frustrating, because I can never account for that. That was what made 5.4 Fury fun. With enough gear you could purge away bad luck, and now it was about optimizing. Once you had your basic rotation mastered, you would work on your cs-rotation and then over time you'd learn how to bank up ressources for that, and then you'd learn how to weave in cooldowns and make everything align with boss mechanics. That process was fun and rewarding.
What I liked about BC and WotLk (and kind of in 5.4) was the constant fight against your rage over capping with Heroic Strike. I never liked that controlled "You have to have x Rage in Bank to prepare for phase y". I'm a warrior! I want to unleash my rage. Not hold 60% of it back. The removal of CS from Fury was a big change that was pretty much needed. But making enrage a core-rotation-need just leads to either making it rare so you would bank for it and in turn just making it a new cs, or frequent and in that case just something that happens. And I absolutely hate that Furious Slash stuff. To be honest it just feels like I'm doing chores to earn my fun of of enrage. I'd rather not have moments of glory then to to something thats not fun at all, just for some seconds of fun.