The game has a few areas where it is strikingly lacking. You can set a ships acceleration, its top speed... but not its turn rate, yet you can disable said turn rate entirely! So I'd like an AngularMomentumRate or something, if that'd be okay.
Also:
Immunity to specific effects (Rather than all abilities at once) - so you could create a buff to make a ships weapons, engines or the like immune to being disabled.
Ability to disable cooldown rates, so you could render a channeling ability to interrupt everything, ho yez.
Ability to change the amount warp drive inhibitors affect craft - it'd be nice to, say, have a way to boost craft to halve the effects, or quarter them, or the like without it also rendering them able to jump in a second without the presence of a buff.
Ability to steal materials as well as credits.
The ability to modify shield mitigation maximums as a specific buff rather than a research topic.
Doubtless there are others, if folks have requests add them - but I'm trying to keep this stuff simple, guys. No pie-in-the-sky stuff, just modifiers we know should be fairly easy to make present, but aren't.