I feel a lot of teams overlook JR and only train JS. JR is now more important in this new game engine
I am really torn on this matter. Many of the elite team feel that JR is not important. Infact one of the best teams in all of BB will not train it past proficient. I think it is still a very important skill but question how important it really is.
As far as driving goes, it too is quite controversial. My belief is that alot of the skills you train depend on the long term overall look of your team. If you plan on being a team that pounds the bal inside I would say that passing and driving are huge skills to have. If you want to be a team that plays with lots of motion and shoots the ball from the perimeter driving is a bit less important imo.
For a new player I would strongly suggest balance. Try to build all round balanced players. It ensures that your players keep relatively low salaries and you will soon find that they are out performing guys with double or triple there wages.