I can agree its gone from a "burst" class to a "sustain" class, & a near spamy one at that, I mean I only just yesterday started to get my mind around what is needed/required to do & spent a fair time smashing my brain against built-up Muscle Memory from MCH's very release in HW (rotation-wise it didn't change much from 3.0-4.0 just got a new gimick that was clunky to use right) & I feal its become something I might have to shelve like I did PLD a few months back, shelved PLD cause I was done being a Tank not cause I couldn't use it. Drill/AA really should have been eather a 2nd rotation at less pontency or an oGCD cause atm their really hard to remember due to how they act when rdy (as OP pointed out).

at lest SAM's core rotation mostly survived so I'm just probably gona change to that when I shelve MCH after a few more tries, honestly wish I wasn't as I loved MCH since 3.0 but I'm not gona force myself to play a class thats so radically different then before & feals off-putting to play