"heavily buff"
don't the buffs for both barely add 2% DPS across the board for each?

As for MCH, honestly, I wish they just added to HW MCH instead of gutting it the way they did, Overheat and Flamethrower were half baked ideas and implemented terribly, especially with how well HW MCH played in comparison, messing up an oGCD on your burst didn't hurt as bad as it does now, it also didn't feel "clunky" like it does now, I like they removed the cast times, but we got the heat gauge instead and honestly, I would take the cast times over the heat gauge any day.

MCH could use an overhaul as opposed to a buff imo, as it is now, it contributes to the party fine, but it just isn't fun since it got streamlined for Stormblood.