Here is what I'd like to move to.
touring.tire using simplified Pacejka combining (4 parameters instead of 15):
All three tire types (touring, sport, slick) will be using the same (hankook) combining parameters for now. They can be individually adjusted though.
I'll push tire editor updates when ready:
https://github.com/logzero/vdrift-tools
I also would like to make some adjustments to the tire curves in general, to have a more clear difference between the tires (pushed a change to reduce side grip of touring.tire today).