Solved

Points on tyre wear

I increased tyres by 12 points in design but the wear percentage did not change I was expecting at least 1 percent better. Is this the norm or a bug????

Tyre wear only decreases very slowly. Probably to mirror real life conditions, where you are also not able to do the whole race on 1 super soft stint. Some idea to make it better would be to add the decimals into the equation, like they do with fuel economy already. That way you see results, but keep performance close to real life conditions.

It's maybe 1% for softs if you're at 80-100. I think medium and hards won't change at all. Super softs may react a bit stronger. But all information without guarantee, since I only see my data, but not a corresponding one where DP weren't assigned. Also this is data for 75% distance races. I don't know how it may work in other race length scenarios.