MCH biggest issue?

[Zojha]

I think that a rework wouldnt be that bad of an idea because right now, SE has no clue what they want with MCH, which is just sad...

They have a very clear clue what they want with MCH: Wildfire.

They just don't know what else to do with it. Even the new, shiny gauge is just another extra clunky CD to add to it and when you read through the thread, most gripes seem to stem from issues with optimizing the one trick of the pony one way or another.

The rest is just tuning. They're getting close to where they want it, so changes are gonna be small from now on.

Personally, I find that too one-dimensional. I quite enjoyed it when Overheat was an ambiguous gain at best and had hoped they'd reinforce the notion of Overheat being something you don't want to do in order to capitalize on Heat management mechanics in future expansions. Turns out they went the other way and aligned all cooldowns and even Hot Shot to Wildfire to drive the point home.
Well... if that's what MCH players want, they can have it. I'm playing something else >_> But since you (as in: The OP) asked what keeps people from playing the job, well... there! My 2 cents. I still find MCH quite enjoyable when I "don't" bother with Overheating, but there's the lingering feeling of guilt when I do because it's quite obviously less than ideal, so I'm not burdening groups with it very often.