In addition to making them more powerful it would be useful if characters such as android types gained new abilities by switching out tech.

Granted this is not enough for her to pose a threat and be a main spotlight but good enough for her to possibly be conceivably eligible to take part in the upcoming tournament (the last one was a sausage fest). Brief/Bulma having spent time with Gero's blue print and technology improving every year found a way to increase her power output so she can take on a Super Saiyan 2 fighter (hell let's make her as strong as Super 17). It would of been interesting if her powers had grown through the 7 years and even in battle of the gods via Bulma and/or her dad doing work on her and improving her efficiency and power. So android 18 started out as more powerful than a standard Super Saiyan.

I think it would be a breath of fresh air if some characters become stronger not through the use of training but through the use of frequently upgrading their body with new and improved technology. Android 18, originally known as Lazuli, was transformed into an immortal killing machine by the evil Dr.