I remember this. MCH was really good back then(even if it needed a couple buffs here and there to compare to BRD's utility at the time) and was particularly strong due to Wildfire. I've said this before, and I'll say it again: They should uncap Wildfire Potency and let it be a % of how much damage you can shove into it. That way, MCH can actually get the big payoff it's been missing for it to be up there with the likes of Melee at minimum.
Flamethrower needs to be a Combo with Bioblaster that can apply not one, but two DoTs together instantaneously. Sure, it'll be like BRD a bit, but you're not going to sit there twiddling your thumbs for 10s while stuck in a channel at least since the thing no longer generates heat(which is asinine given it's literally fire).
Auto Crossbow? It's only good on 3+, they just have to give it the same treatment as the ST Hypercharge rotation so you aren't feeling like you're missing something in the "feel" since Hypecharge is meant to be your fast phase. Other than that, getting down to brass tacks potency for Scattergun and Auto Crossbow vs. the ST rotations is now 3+ compared to its previous 4+.
What we need damage on though are our big hits(Full Metal Field, Chainsaw, Drill, Excavator) because that's where a good chunk of our damage is if they want to keep the job selfish.