The online racing simulator
More tyre types OR adjustable per server tyre life length
Subj. It can bring new life to league racing if you make something like Slick R2.5 tyre for formulas which last just for 30 minutes of racing.

These days you need a fairly long race to make people change tyres so we don't see any strategy play very often -- just in endurance.

And it is very simple to do!
Adding more types of tyre sounds good, but I think current tyres are just durable. I mean, real touring cars make a pit stop almost every two or three laps, and it does in LFS depending on personal settings.
Burning tyres up and physical tyre wear are two separate things... Dozens of drivers say on FBM servers that their tyres are destroyed after 3 or 4 laps, while they're just hot and can last for next 30 or more laps...

FGED GREDG RDFGDR GSFDG