I actually checked the Ware in the Core Rules today and made a list of possible Overdrive targets. Itīs not that long, and itīs mostly quite reasonable.
The juciest bits after Control Rig and MBW (see below) are Wired Reflexes, Muscle Replacements and Reaction Enhancers. However, these are subject to the Attribute Enhancement Limit. If you are a cheeselord, you can install wired reflexes and reaction enhancers and convince your GM to let you abuse their wireless bonus to circumvent this Limitation. If you survive the Phonebooking
Sense Enhancements are next in line. You can enter a kind of hyperperceptive state with this. However, thatīs pretty flavourfull IMO
Then thereīs a lot of perception, stealth and movement gizmos: Ultrasound, Sonar, Hydraulik Jacks, Voice Modulation, Retinal Duplication... Might be interesting but I donīt see anything that would get too ridiculous.
Thereīs a small group of rated ware which you obviously canīt really overdrive for simple common sense reasons: Air tanks wonīt magically increase their volume, same for Biowaste storage (just in case you wanted to
literally be full of shit
). I also wouldnīt allow it for Dermal Platingl, because common sense.
Smartskin however ...
https://www.youtube.com/watch?v=XJvOxFhVNbQ. Yeah, Iīd allow it
The most "broken" things IMO are MBW (again, I think itīs justified for the risk) and Control Rig. TBH, an overdriven Control Rig is really insane, without the huge risk and without looking like a spastic freak for the entire run. Oh, and Hardwires. The description suggests that these are still just running Autosofts and thus canīt benefit from a rating higher than 6, but itīs not clearly stated.