I find it a bit unbelievable that we some how managed to giant mech suits and not eye implants. If anything, eye implants are less advanced than mechs considering we're much further a head with fake eyes and optics than mechs in our time.

As for the legs, I'm still not seeing a whole lot of sense in it but as for the "cybernetics eat your soul" part, why not have it that pilots have computer chips stuck in their heads that greatly improve their abilities but reduces instead of making them less shorter lives, it slowly replaces their personality and memories until they are literally shells of themselves who can't feel anything.

Again, I don't get why the legs have to be cybernetic or we'd be in high altitudes most of the time. I suspect that if we where to go that high or fast, me might as well use planes instead of mech. Hell, helmets could that scan brains could be used instead and use a sort of NGE-styled consciousness link.