I haven't read most of this thread but my thoughts on this are:
It all looks pretty good to me, apart from the TC bit. I say allow 4WD, it'll get teams like Audi in. Have a 3 litre V6 with the 10k RPM limit, should give about 900hp(?) and not be too heavy either. I don't really care about the biofuel so that's ok. Powerboost isn't bad but I say don't allow the person in P1 to use it. Could be hard to control though.
To sum up:
- Allow 4WD
- Take away TC
- Use 3-litre V6s with sensible RPM limit
- Allow more teams, have Saturday races. Heck, even have regional championships for a place in the world championship if there's too many teams.