Heya Dingo, not using it for deceleration, but for mid corner corrections, a weight transfer to the rear so the front tucks in. A whiff of rear will tighten up my line to adjust for traffic or help recover after cooking a turn. Very helpful on twisty roads I'm unfamiliar with.
My previous bike was not an issue, the way I could lock my knee into the tank allowed for me to trail the brake. Haven't been able to get comfortable doing it on the 959 and my messed up knee starts to fatigue if I cover the brake often. Different rear sets and repositioned tank grips may help but that is my only issue with the bike. If I can get a thumb actuated brake for close to new rear sets....how cool would that be?!