Good read. I take badly to driving any car on track having had an Exige for a year. Going back to power assisted steering is night and day in terms of feeling the front end. The brakes coupled with the lack of mass just give you so much confidence on how late you can be. I jump into my sons track prepared M3, which is stripped, caged and on track suspension, and it still feels imprecise and lardy! It still handles well though . It's also a lot more effective at chewing through parts. Exige just feels bullet proof from track day to track day.
Surprised at the understeer comments. I don't experience that (well, not in a 350). I run the same pressures as you too. Maybe a difference in the Corsa's to the Cup 2's.