I never use the low octane fuel (LOF) switch. Tried it, didn't see much of a difference. Its effect is mostly above 25% throttle opening, much more throttle than I use when off-road.
You could use TuneECU to retard the timing, esp. in the low throttle/low rpm. It should give you more control and less snap. But, it would reduce the fuel mileage and power too.
I've had an idea for a while to create two power settings. Use the LOF ignition map to create this 'soft throttle' setting using TuneECU. Then put a switch on the handlebars to control which map to use. The LOF map for off-road and the normal map for on-road mileage and aggressive situations.
"Dad, can I get a motorcycle when I grow up?"
"Son, you can't do both"