Hi all,
I'm not sure how popular my suggestion might be, but I was thinking about this a little more last night, and whilst tyres are an issue, I think there might be a little more to the problem which is the elite league as a whole.
As I understand it, with Max development of 100 you dont get a bonus from your engine / tyre / fuel to push it over 100. So in affect wasting the need for a supplier. As a team gets mid season and maxes its development, the easiest way to save time on the track is to stop less... this also helps promote hard tyres, since they have a good wear rate, and reasonable lap times.
As well as a review of tyre wear, maybe its worth looking into the development CAP on each league?
Rookies 40/50
Pro 60/70
Elites 70/80
This would also players supplier choices to factor in too! :)