Most riggers are going to have a very high Reaction. As you get into the higher rated VCRs do you really need to invest heavily into vehicle skills?
Lets say you buy reaction up to 5 at creation and have level 3 Reaction Enhancers you have a Reaction of 8. Then you buy R3 VCR (used). While jumped in have 8 (REA) + 3 (VCR) + 1? (VR). That is 12 dice before vehicle skill, specialization, or qualities (and I may have the VR bonus wrong)
I certainly wouldn't advocate defaulting, but if you put ¥ >> skills at creation what does vehicle skill get you?