I don't think many of us are willing to deal with MCH having a gap closing or melee range move unless we get another Gun job to cover the current style (Cannoneer? Corsair?). I find its current charm is in how static its rotation is, which afaik is only really possible because it doesn't have to worry about rng procs or being in melee range.

As mentioned by some others, having some oGCDs for the Automaton Queen that don't shut it down could be neat. That or having it always out like old SMN and spend battery to do an oGCD melee combo or somesuch. Dunno if the AI can handle that sort of thing reliably though, especially with high ping.