Hypercharge: I think you should be able to land a 6th one with 10 seconds. 6*1.5 = 9, you have a whole extra second for mistakes.
They need to add a PB/Bunshin charges system with a bit more generous set duration to fix and not break the MCH.

Tactician/Troubadour/Samba: Back in Stormblood, MCH and BRD used to have 2 different mitigations. BRD had a longer one on a longer CD (with extra complexity), MCH a shorter one on a shorter CD. They removed many support tools from ranged and SQEX probably thought that it would be too visible if they made the mitigations a role action. On top of that, Tactician is a recycled animation, Tactician was a TP regen used by both MCH and BRD when TP was still a thing. It's designed like a role action but somehow it's not a role action. In short, yes it should be a role action.

Wildfire: Wildfire has a bad history of being massively RNG dependant. Before, every damage you did for 10 seconds was accumulated and a percentage of the total damage was reinflicted. But due to crits, it had unreliable damage and was the core of MCH DPS, you could have a 10/20k discrepancy. It was a request for MCH DPS to not be massively dependent on Wildfire, they delivered a bit too much.
I see that you are lv72, at lv78 Wildfire will have stronger potency but it will remain your weakest DPS tool in many content. And weak by far, it won't do half the DPS Air Anchor offers. A handful of players asked for Wildfire buff, cooldown reduced at 60s for example, but SQEX didn't touched ranged since the measly ranged buff.

On top of that, it became boring. Simply put, it's a button to reinforce your next hypercharge.

Utility: But you have utility! Remember that, if your party has at least one ranged, everyone gets... A 1% buff to all their primary stats! (This applies to all roles, Tank, Healer, Ranged, Caster, Melee)
Yes, it's crap, it basically forces every 8 man comps to have a ranged on the team for the purpose of min-maxing, so all roles are played. Ranged dps is fine, it won't die if it doesn't gets a buff. But it deserves a buff or more utility.
This forum has been full of complaint about those point since ShB release but all we got from SQEX is that they didn't knew what to do about BRD and that they are satisfied with balance.

Many others were against any buffs thinking everyone would play 2 ranged because of mobility but that was easily dismissed through actual past scenarios.
Mobility, SMN has a ridiculous mobility right now, RDM has always been mobile and BLM being a turret is a false idea.
Jobs are also mostly played based on how enjoyable they are, not how they perform and we have data from HW where the "meta" was MCH/BRD/DRG/NIN, BLM and SMN were quite fairly played.