Throttle Response could be down to mode, and if its completed it's run-in. Use it in Race to get the best from it On-Road. Not sure if Slick gets more but the jump from Sport to Race is noticable.
Neutral isn't easy to get, been covered to death, it's a "feature". 2nd to N easiest when stationary. Getting N easiest when still rolling.
Lots of the bike is built to a price, the levers are a victim of that as they expect you to throw them away if you race. The "HP" BMW levers and rearsets are almost a must have from the factory.