I like current MCH, but miss many of its old mechanics, and feel like there is room to add them back. Wildfire has also been a problem for some time. Hoping SE sees this proposal.
Wildfire fix: Since Wildfire's problem is that it makes GCD windows tight for higher latency people, my proposal is that Wildfire last 15 seconds and the boosted damage only stacks up to 5 times. This gives plenty of time for 5 GCDs. However, this might make it seem less interactive, so I think you should also be manually required to detonate it (there's a cool manual animation in game, btw, and this would feel thematically right).
Turrets: Give us Turrets back (Both Single Target and AoE), completely separate from the Battery Gauge. Keep the Queen mech, but remove Queen Overdrive and instead give us Turret Overdrive, which boosts the damage your turret does for an amount of time (maybe destroying the turret and requiring immediate redeployment). Queen mech does not replace turrets, but is an additional ally on top of them.
Hypercharge: Heat Blast and Auto-Crossbow are removed. Hypercharge is an oGCD which when used transforms into a GCD Turret Superattack, AoE or Single-Target depending on which Turret you are using. These functionally work the same as Heat Blast and Auto-Crossbow, but fit thematically better. Change the GCD of this Super-Attack to 2.0 seconds, and make SkS affect it, however make it impossible for any reasonable SkS to afford 6 attacks during Hypercharge. This makes Hypercharge less punishing based on latency.
AoE Combo: Spread Shot -> Auto Cross-Bow -> Flamethrower, where Flamethrower now just shoots a single blast of AoE Flame (like with Bio-Blaster).
Reload: I liked Reload. Can I have Reload back, with Full Reload as well? If so, then in addition to making Heated Clean Shot add Battery, also make Reloaded shots add Battery.
Currently, MCH has 19 skills + 6 role actions, for 25 skills. Most classes have about 30-32 skills total including role actions. I am asking SE to remove 2 of those skills (Heat Blast and Queen Overdrive). That's 23 skills.
I am asking SE to repurpose Auto-Crossbow and Flamethrower into the AoE combo. Then I am asking SE to add the Hypercharge GCD onto the Hypercharge button (another two skills, but no extra buttons) and to add 3 Turret buttons (Single Target Turret, AoE Turret, and Turret Overdrive). That's 28 skills but only 26 buttons.
Then, if we add Reload ontop of that, we get 30 skills but only 28 buttons. Still less than most jobs, and plenty of room to add more stuff.
I get that some people didn't like reload. I did, and I want it back. But if SE feels like it would be bad to add it back, that's fine. I hope they can see why the rest of my proposal would work out for MCH though, both thematically and mechanically, making it altogether more fun to play.
Edit: I realize after writing this post that there is a whole thread on MCH open, but since that post seems like a discussion post and mine is a proposal (not necessarily expecting any discussion) I hope that they are different enough to warrant different posts.