What they should of done is made machinist more like Vincent from FF7. Call the job a different name if need be. I have not leveled mch so I don't know the story around it but I assume it wouldn't be as neat as a story of why as said job being able to transform into a chaos mode etc. A good chunk of the "gun" abilities could remain, scrap turret and replace with mechanics around chaos form.....
thought: how many ppl would switch to mch the way it is now if a Vincent glamour came out only for that job...