Not sure if this idea has been floated before, but it seems to me that the stat share of Mechanical Genius is better suited to turrets rather than mech. Turrets are have very poor stat scaling and are a meme pick (except for Rifle for its toolbelt skill), they haven't had a balance pass since 2017 (according to Wiki), and their static placement makes it much easier to play around this trait (rather than the trait playing you). Each turret can have one stat that is most relevant to it, like condi damage for Flame Turret, and the cooldown can be increased.
Of course, this leaves the issue of balancing the mechanist - personally, I think the only scenario where it's performing above and beyond is in the alacdps (maybe heal as well, but I don't play it as much). It's not uncommon in raid scenarios to see mechalac dps easily outdps-ing full DPS builds (average mech vs average dps - not your rotation zealots). One way to address it would be to stop other mech skills activate after the mech casts Crisis Zone and maybe increasing the barrier alac interval. Having 100% alac/quick uptime should require a decent investment in Concentration, not just a few token Diviner pieces. This will only affect LI playstyle when all mech skills are on autocast; if you have a delay of 10 seconds after casting Crisis Zone, you can still manually activate the skills in order that doesn't mess up the rotation, but having them on autocast will reduce the frequency with with high damage skills are autoused.