I have a few ideas:
1. A Nuclear Engine with cooling rods. Dipping the rods produces less power, but increases the safety/decreases the destruction due to malfunction. Raising them increases the power/increases the destruction. Furthermore, the rods would have to be checked throughout the round to ensure they are optimal, else a malfunction occur. It'd be an engine with a little bit of playing room, gives the engineers something to do over the course of the round, and can be potentially devastating if misused.
2. For the mechanic, I think it'd be cool if they served more customization roles. I made the pod paint, but I think adding decals that can be colored to the mechs would be cool too. I've got sprites for them, and meant to code them in, butlazy.
3. I like the idea of circuit fires, but I think it'd be cool if knotted cables did that rather than straight up overpowering the system. I think it's BETTER that we encourage engineers meme out the power grid as much as possible, and don't punish them for achieving god tier power. Also, ontop of this, random knotted cables appear in maint, so a picky engineer might want to go into maint and fix those.