Todays engines rev far to high & just breed throttle jockeys. The days of the highly skilled riders that could use throttle control to make the machine work to its best are sadly lost.
It only seems a few years back that we were trying to make an engine rev to 10,000RPM & now they are in excess 0f 18,000RPM & we require a limiter at 13,500 which means nearly 30% of the engines capabilities are unavailable & yet they still rip a tyre to shreds in a couple of races. I think a limiter is a bad choice, it's just something else to go wrong or be by-passed.
My opinion is to limit the bore size which will increase the stroke to achieve 500cc & massivly reduce the RPM back to a level where the motor will work efficently at lower revs & provide a much smoother working band for the riders