I can't speak for Bard, but I've been MCH since around halfway ish through Heavensward. Been playing a fair amount of Stormblood and a couple things i would like to bring up.

1: Flamethrower is incredibly niche and the potency isn't worth using (Nevermind how buggy it is) In an AOE situation, you almost never wanna raise your heat. The only real use this has is recovering from an overheat, but we have Barrel Stablizer for that.

2: Overdrive. The only use this has is if you're dealing with heavy movement that would cause you to move the turret or, if it was about to be destroyed. Two problems with that though. The potency, and the turret lockout. Removing the lockout would probably help bring it in line.

3: This is more nit picking about the effectiveness of our abilities. Hot shot needs to be brought up from 5% damage. Raise it to 10 or 15% and maybe increase Wildfires duration to 13 or 14 seconds.