Kidding aside, I wish SS Devastator had more standardized limb connections. I guess the arms also being part of the torso make it tough, but hear me out:
New limb potential- Duststorm, redecoes, whatever. And maybe they're not always construction vehicles-- maybe a submarine or dragon.
New torso every year or whatever-- sometimes two guys, sometimes one big guy.
Have an actual combining system, designed to be its own quasi-subline for several years. Revenge of the Fallen introduced the idea of Devastators being formed by various Constructicons and not just five unique individuals.
Maybe not all arms can also be legs or vice versa, but it'd be nice if you could at least swap arms, you know?