Yes because this is so much better...
I'd just love to be the healer for that, as the entire alliance's dps go down on the first cleave from the boss. That sure does sound fun!
That's not even touching problems like mechanics that target DPS with ground target attacks now getting placed on top of your tanks, requiring tanks to move bosses more often when a lot of fights require the tanks to keep the boss in a specific spot. And other incredibly numerous other problems that come with a DPS job designed to attack from the front, all for what? When you could just make that job a tank.
Why would Ala Mhigans have PTSD from firearms? They employed them themselves, with cannons and likely other forms of firearms. They were the strongest military force on Eorzea before the Empire invaded, likely one of the most advanced as well, having repelled numerous invasions from the north. Blackpowder weapons have been around for a long time.
Machinists are quite different as well, they are not decisively Garlean in nature, rifles have been around Eorzea for a long time, and the key component of Machinists is the aetherotransformer, which was invented by Stephanivien and certainly isn't Garlean tech as it converts an individual's aether into lightning aspected aether to power the weapon and other devices. Garlean tech is not fueled by individual's aether but ceruleum since pureblood Garleans have very little aptitude for manipulating aether (their own nor ambient). Even then, Machinists don't exist without a certain level of scrutiny from others.
But now we're talking about post 4.0 stuff which then makes the concept a bit more possible as we push the Empire back, their power diminishing etc. But that's another 2-3 years out now if we're talking 5.0 stuff. It doesn't make quite so much sense to be implemented in 4.0, where we will be actively fighting to just retake Ala Mhigo likely during the entire 4.0-4.1 storyline. Cid being the person to throw it together seems off though, I doubt he'd have any reason to do such a thing and as with every Job trainer the actual trainer is not an important figure to the game's overall story so it's highly unlikely Cid nor Nero would have anything at all to do with it.Honestly I could see this as a thing. New free government of Ala Mhigo, they want to reestablish order with the people that have lived maybe happily under Imperial rule for 20+ years, jaded refugee returners, newcomers and adventurers. They get Cid to cobble some nonsense out of the 20+ years of Garlean junk laying about and make sort of a police force open as members and as volunteers (see: Sultansworn/Free Paladin). You could run the whole questline based off of Judge Dread... would be pretty epic I think.