MM is very fun and if you have the right raid composition it can achieve the DPS of the simulation. Unfortunately, this is highly unlikely for the majority of players, and you’ll face serious mana problems first and foremost, then you’ll drop DPS because of the movement in gameplay that MM sims don’t take into account.
I’ve never been able to get into Survival, as it’s just not my cup of tea with the rotation, and I’ve also found it equally mana heavy when I’m in a PUG or don’t have a Paladin for JoW - aspect dancing is HORRIBLE!
Running in to trap weave on some fights can be rough, even with disengage, as plenty of bosses will throw out proximity debuff a that could cause you to wipe the melee or the ranges you disengage near.
I only go to PUG or my guilds alt raid, and if the comp is wrong or the DPS is low (not horrible, just not at the peak) then I have to sit in Aspect of the Viper for way too long…
Some minor glyphs to help mana management on MM would be more enjoyable for me, and if I wasn’t aspect dancing 20% of the fight I’d be satisfied.
MM should be buffed for being a turret, and SV should be buffed for trap weaving (likely with the minor glyph to activate Explosive Trap in combat that someone suggested above).