[Ross Dowson]

With this Sof system the luckiest fast driver would be the champion ...   it's not fair at all .. If i can't participate on the highest Sof race on the week I would get less points and No chance for maximum points If you are not lucky enough ... And no clue which race would be THE RACE with more points because of highest sof.

The current system is quite good and If you want to be champion you have to win about 20 race from 30...yes, there are easy wins with lower Sof and harder wins in peak hour.... And very Hard races with lower sof because another fast driver in the server.

There would be an element of that, certainly, but averaging the points of the best half of your races would help to avoid it because it's not likely that you could deliberately get into the highest SoF race of the week within the first two races you entered.
If you raced more than two then it wouldn't only be the highest SoF race of the week that your points would be calculated from.

I agree with Laszlo, one thing i ve learned around here, you can never assume it's going to be a walk in the park based on rating or the number of drivers registered. I had very difficult races with few people and what would be calculated as a low SOF in this sytem, because some didn't have the rating they deserved, yet, since they didn't have enough races, or they are simply new on SRS (but clearly not to simracing). And sometimes much "easier" wins in split 1 full of 700 rating, for the front runners that system just brings a random element to their results, but yea it's a bit more problematic for some who can get like +90 points while being very far from say the top 3 (although that does even happen in +90 drivers' races), but i don't think anybody is trying to only get in the less populated races like that  on purpose.

iRacing deals with this i think, by giving everybody something like a 2500 rating to begin with off the top of my head, then modulate it from there, but here you need quite a few races to start having a rating that somehow translates you actual level, i would say at least 50 starts, except if you win pretty much any race you registered for.

SRS currently deals with this better than iRacing. iRacing gives you a global rating and which split you go into is always calculated from that. SRS does that for the first race but afterwards assigns you to splits based on your performance in that series, it's something iRacing players have been crying out for for years (series-independent iRating).
That aside, you're talking about less likely scenarios and outliers but these are not the norm. The norm is that the drivers in each server are being assigned roughly correctly based on their performance, not that you get 20 Ayrton Senna clones in the server who just happen to be in their first ever SRS race.