The function of a console has to come first. Changing capacitors isn't a mod, it's repair. I would even say that RGB port and scart connection are also repair, your making the unit work better in it's original condition.
I would only say it's a mod when you alter it's capability, multi region, LCD, power requirements.
Personally I like to keep the ones I have fully functional and as unaltered as possible, for collecting purposes. Ones that are played with altered as much as you can to improve the quality of game play and functionality!