Looks great. I have been active in RallyCross for a few years, and enjoy it a little more than autocross.
I wrote a RallyCross novice guide if anyone wants to get involved:
https://medium.com/@JimRowland/rally...e-35cfd71f9581
I don't RallyCross my FR-S (rather the SE-R below), but I have seen several 86's at events. I think the car is definitely competitive in the RWD categories. It has limited slip, plenty of power for loose surfaces, and is reasonably small/light.