1 - Temperature and rain control;
Is that you Bernie? (Bernie Ecclestone, former FIA "boss". He suggested installing sprinklers on the track to create artificial wet races)
I think that is horrible. We currently have real time weather, that means you have to check the weather before and possibly during the race. Controlling it your self only take one more variable out of the equation that separates a good manager from a bad.
2 - Create league only if level 20;
Why? How long does it take to be level 20? A year or more? That's an insane amount of time. Everyone can see the level of the league owner before they join so I don't see the problem?
3 - Indicate new drivers the existing leagues according to the race time and number of drivers he wants to create one for him.
I have no Idea what you are suggesting here, sorry :S
4 - More DC with main attributes in the market.
You mean CD (Chief Designer)? I find plenty of good ones every day, but then I am low level and don't know if it is more difficult at higher level. Although I rather they make the lesser attributes more attractive to make more strategies competitive, not only focusing on the big 4.
5 - Better tire fit today, 90% of the races, we only use the S (Soft), the strategies become standard, without emotion in the races.
Again, I am low level so Cant really speak about this other than that I see lots of different strategies in the numerous races I watch. But if it really is a problem, I am all for tweaking the compounds. The only tyre I personally didn't find the use for is the Hard tyre, but I'm only basing that on 8 races and my league is 50% x2. I can imagine a bigger use of them in 100% races.