I would suggest a reworking of them.
The 4 power stats are still ok but the impact of the others needs increasing otherwise there is no point in them.
Fuel The effect should be higher. Maybe fuel 100 would equal 25 litres and fuel 0 would equal 50 litres to do the same distance. Then make it linear. That will mean significantly weight if you neglect the stat.
Tyre wear. Again 100 % maybe has wear and tear at 9% but 0 it is 18 or 27%. That then filters down to other compounds.
These two should be easier.
Reliability would need to relate to retirements. Link to the percentage chance of it happening as a direct correlation to the stat. Maybe 0 is 51% and 100 is 1% failure.
Same for cooling so if both are bad then you need to watch push levels
I think if then you add a temperament to the driver then you can link crashes in races