Worth thinking about,but 4 or 6 laps i think it is still a supreme test of man and machine.
When they reduced championship boxing from 15 rounds to 12 rounds it still produced a champion with the coveted champions belt,so I think it right that the existing trophies should remain.
Regarding comparisons with the 60s era the higher speeds of today as a reason for reducing to 4laps is quite honestly not proven.The M.V. ect of the 60s would do 160mph and a Manx Norton was good for around 148mph and remember the reliability and handling and tyres in those days could not compare with the modern machines.Plus the fact that the coarse is a hell of alot smoother today.
The big mistake I believe they are making is running a practise session immediatly after racing.Practice should be in a more relaxed atmosphere and i can see a situation of riders coming from racing conditions into practise conditions with the adrenaline still pumping