The restrictions mentioned are not RPM restrictions, rather the rate at which the throttle bodies open and how far they open at different throttle positions in gears 1,2,3. Just as, both the T and S modes have the same HP and RPM, they have different rates of TB opening. Having said that I had my 2012 flashed and it was a big improvement over stock. With my Gen 2 2014 model I haven't as the bit of increase in HP and ECU tuning from the factory are better than my stock 12 was, so I have not taken the time and $ to have it flashed. As for engine braking, most that have theirs flashed have had a reduction in engine braking, which they like. I like the stock engine braking and use it as part of my riding technique, so don't have a desire to change that. Perhaps if I rode a Gen 2 that was flashed, I would change my mind, but I haven't ridden one.