Got the toe arms, STi trailing arm, and MCA mod installed yesterday, then went to get a string alignment from shop close by that does race car stuff.
Zero'd toe all around, evened front camber at -1.8°, reduced rear camber to -1.5°.
Rear tire just barely poking now which tickled my OCD.
Only drove the car to work so far for impressions but I did notice immediately over familiar bumps that rear suspension is more compliant. There is less jarring rebound and compression on impact that could make the rear end feel like it's skipping over bumps on throttle.
Hit same bumps on throttle and the rear end mostly absorbed. Will need to live with it a bit but immediate impressions are good.