I think that was Race Pro. If steering input assist can be implemented on console, like TC, ABS, etc, then it should work ok. It'd be a matter of fine tweaking the analog stick so it isn't too sensitive for steering.
All cars they update will have the new CPM, like all cars since the chassis flex was enabled have had it, and the new steering system, etc. They don't go and overhaul all the existing cars when each new feature is added.
I believe the plan is to alternate new and updated cars. And also I believe some tweaking is required beyond just recalculating. Hopefully won't take 10 years though.
From ISI you have a safety car, and it's not that good of a model compared to most other things. The person who made the SC for us has a better GT3 version now, so we'll be using that.