Answers
1. No it won't lock the rear wheel unless clutch is in and using front brake. It only has enough pressure to feel drag and settle suspension. Yes tons of feel and control.
2. The only way u know how hard u can throttle is to break the rear tire loose, when that happens you will either low side, high side, or pull some super drifting skills out of you a**. Using the thumb seemed to keep that tire from braking loose. I was once exiting the carousel turn and broke the rear wheel loose, before I knew it :-) butt was trying to out run my body, then suddenly SNAP! It caught grip and I was hanging off the seat by my boot and the bars. I managed to remount the bike and continue. I never wanted that to happen again.
3. Comparing laps times is hard through my 6 yrs racing my lap times continually got better untill I hit the 1min 12s on a 2 mile 13 turn track. Then I retired.