The current unfolding tire saga highlights the problem with control tires in a nutshell. In theory they should be designed to accommodate the variety of machines on the grid. In practice, it often turns into a situation of them only benefiting a couple of machines and riders. Subsequent changes...
Scenario...
You have been invited to a special track day watching two of the sports elite riders test two completely different bikes, one a poorly designed pig and the other a weapon that handles like its on rails.
Rider A posts the very same lap times on both bikes matching the lap record...