ok alot to take in here
Rico/Gauss isnt "rapid fire" rapid fire was removed so we can spam heat blast 5 bloody times instead its padding plain and simple 6 ogcds worth of padding no other job has because they have basic structure my rework thing was a gag but wouldnt mind loosing one and have the CD reduced if we MUST have it on. But due to having full stacks from the get go and only playing a role in MCH most restrictive phase with HB the best way to utilize them is to Spam! not speed
You say they need rapid fire but you want them to "Bunshin" heat blast? this would make the job even more mindless and unfun the only threat how ever small it is, is keeping up ur ogcd with ur one button wonder eliminating it for safer ping friendly Stacks would eliminate the only rapid fire thing MCH has.
ignoring the drill/bio argument as it could be fare more useful instead of being fodder, Ricochet is also a aoe, so is auto cross and flamethrower. St/aoe choices should belong to Gauss and rico and they arent gimmicky but they are in the same lane as RDM fleche or MNK tornado kick except RDM has alot more going on and doesnt hype it up as the one thing that makes the job fun and Tornado kick is a ogcd so it can flow evenly with its fists. remove drill to reassign AA to its role and the job is as samey as ever and wont change that drastically and can still have the link to bio if its so vital to 3 fights
MCH aoe is a incredibly small improvement to SB that being the case DNC and BRD has much better Aoe tools. DNC ST and Aoe rotations are the exact same which makes the job a bit boorish but makes the aoeing more layered, BRD having its own issues is pure madness in a good way with ballad and apex aswell as stuff like Shadowbite which encourages u to dot then blast with apex and rain or speed with paeon just needs to iron out a few of its loose screws, MCH is so far behind both of them that its remedial Auto being the same as Heat is a given but since FT doesnt generate heat and rico stacks dont generate and ur Bishop turret was removed so no aoes, and Bio being just as fragmented but more frequant. MCH more often than not will just have u spam spread like its SB again u need to do this 10 times before auto is active which lasts only 5 gcds. compared to literally every other dps in the game thats incredibly weak stuff