CaptainMongo
Interesting incident. But I am afraid your conclusion that roll response rate is being governed by the flap lever position is incorrect. I reproduce section 3.1.19 of your report which is very clear:
The lateral control laws applied by the flight control computers corresponds to actual positions of slats and flaps(para 1.6.4). During the event the gains and kinematics corresponding to config full were not selected due to the fact that the slats were retracted.
During GoAround the crew retracted the lever to position 3 which moved the slat from full to three that reprogrammed the roll rate and not due to the flap lever position.