The State of Machinist in DT - Let's talk about it (again).

[brinn12]

So long as no other role outperforms even the 1% stat bonus to every party member that taking at least one Ranger provides, MCH doesn't need to be able to be buffed up to topping the charts. It need only be able to compete in cDPS with BRD and DNC even when not being buffed by DNC (because it won't be, because it's not BLM/SAM/VPR).

Note that SAM also has to compete with a role (melee + BLM) that likewise leaves everyone else in the dust and yet it manages that just fine even when you remove the results of all single-target buffs from its meters. With Dancer being a non-factor, nothing separates the situation of MCH within its role from that of SAM in its role.

MCH getting a raid buff wouldn't be the end of the world by any stretch, but short of Savage 4-man content forcing VPR and SAM, too, to syphon some of their personal power into raidbuffs instead, there is zero need for MCH to give a raid buff.

I've elaborated about this on the first page. Every new expansion, the game scraps the work the balancing team has done, increasing the ranged tax and heavily favoring melees. Square Enix only work with buffs (PCT case being a rare exception), therefore they're going to buff DNC and BRD for the entire expansion, since any non-MCH buff favors them.

With MCH not buffing other jobs and also not being able to deal high personal damage compared to other pure DPS, the job will be stuck in a loop where it's either super weak or just weak in the meta. This will happen until SE rework the role entirely or give MCH a raid buff.

If you don't believe this, just think about how the job has been performing for the last 3 expansions, and how many times it got buffed. There is 0 chance SE will ever sort this out by keeping it a pure DPS. It takes them until the 3rd tier to do the job justice, and in the next expansion the entire work has to be redone.