Let the *geniuses* have their idea.
Okay..... whatever that's supposed to mean.
Anyways car repair kit may be useful on certain RP situations where you need to stay put for some reason. Also, a nice thing to have when you manage to drive into spikes with PCJ. There are sure to be some situations you may find it useful.
The engineer part is also useful RPing tool.
It would be nice to see gang/mafia members specialise on secondary job aswell - Medic, Engineer, Business man, Prostitute or whatever role that can be useful to your gang as well as to other people you play with. It would certainly help to promote other jobs aswell (not only cop/criminal roles).
Medics for example are valuable to have as they can heal their teammate's bullet wounds. With upcoming 2.0, may prove vital part of the crew.
Engineers can repair their mate's car which will save the whole crew some time. On RP purposes, they could deal with explosives and machinery.
Business men deal with gang's properties and make sure cash goes to right place.
Hookers.. well.. no explanation needed.
These are just some examples and Im not sure if you guys even get what the hell im talking about.
But is it REALLY worth it?
These things are not the most important things that should be scripted...
Yet they may prove useful on many situations.