MCH biggest issue?

[Idolon]

And as far as the rotation being "dead", if you're just 123ing your way back up and waiting for cooldown alignments, you're doing it wrong. The rotation isn't Red Mage simple, but it's also not overly complex either.

What would you consider to be "doing it right" then? Once gauss barrel is back on, all you have left is 123 + gauss round and reloads for 30-35 seconds. I'd say that part of the rotation is even simpler than Red Mage, since you're just playing whack-a-mole with procs, one oGCD attack, and ammo.

It works like clockwork now, as opposed to the rather clunky start/stop, forced Cooldown usage before with 10 heat. As it stands now, if you line it all up right, it's all right there when you need it again.

This is actually my main issue with the job now. Heat automatically syncs up with Wildfire so long as you don't die/screw up, and the fight doesn't require you to adjust Wildfire timing in any way.

In fights with no downtime, like O1S, you never have to think about heat. The entire heat mechanic could be replaced by a 20% damage buff that triggers when you use Flamethrower and nothing would change.

In fights with downtime, you often have to make an awkward break from that clockwork cycle to delay Wildfire by a few GCDs. In O2S, you need to be absolutely perfect on your timing to avoid losing part of Wildfire to -100Gs, and again later when Wildfire coincides with Death's Gaze. In O3S, using Wildfire on White Flame will waste it, so you either need to delay Wildfire by about 3 GCDs or force the rest of your party to kill it without you.

It feels like heat is either a pointless mechanic that I never have to think about, or it's suddenly a really awkward thing I have to work around rather than something I have control over.