Ive had S2 but a matter of days now, and I thoroughly enjoy the STCC servers.. in the UF1's, I've gone from noob to above average rapidly.. already about 40% into the second license level copper (?)..
I think these servers are a great way to refine your skills, and with even a semi-serious amount of dedication, advancement hasn't taken that long honestly, im under 2k total in game miles.. Also play around on drift servers a bit to learn finesse control, and drive quiet often on the SR fox/as club setup where I'm running low 1:01's.. Which is something I point directly at STCC for enabling me to do.. granted the UF1 and fox are far different cars, but you learn to find the boundaries, and push them to thier limits, its a confidence booster and can help out overall..
Secondly, I've recently dealt with SamH (I believe it was) about a rimjob noob wrecker on STCC in the UF1's.. I reported the person on the STCC website, with replay, and got a prompt email reply saying the guy had been banned before, and was now perma-banned.. only major incident i've ever had on his servers honestly..
Granted, every open/unrestricted server can get noobs, but typically people apologize, and learn from thier mistakes.. I can't even recall a single blueflag chat spammer on the STCC servers, as it seems the etiquette there is a notch above most servers..
On to the main topic however... No, I don't think the system should be applied across the wider spectrum, for many of the reasons stated above. It is a great system however, and one of the things that makes it great, is there is only 2 beginner servers, and most of the time they are near peak usage with great racing going on..
~Dark