The community suffered tremendously first with the switch of most teams to Source and again (much more as well) with the fall of the CGS. Since then, the CS community mostly resides within the realm of ESEA (so it seems). From what I understood, Lake had to go through some hoops to regain rights for compLexity as a whole, start getting sponsorships again, etc. The superstar 1.6 squad ended up going to EG, and compLexity wasn't really able to acquire a squad nearly as strong as their old one. It's more or less been rebuilding to now, though SC2 is the biggest part of the team at this point (hell, most teams have gone this route). Keeping that in mind, individuals teams don't seem to have the community that they did 5 years ago; TeamLiquid/Reddit seem to be the places where the community currently thrives.
Lake and compLexity as a whole will likely never forget the team's history. New players are told the history and all, so it's not like it'll eventually die off as the old players leave and the new players come in. This post made me think of Lake's interview at MLG Anaheim last year where he actually mentions much of your post; if you haven't listened to it, here's the link:
As for CS:GO, I'm with you, and I really really hope it takes off. It has potential, but the existing CS communities (BOTH 1.6 and Source) will need to back GO up for it to thrive. Realistically, I'm doubting that it will be the savior everyone wants it to be. The community seems very divided about it thus far, and though CS is expanding to the console audience again, I'm worried. Ran into masternook and daffsta on Shootmania a couple weeks ago, and they didn't seem to have the best opinions of it either. It's much too early to tell how today's gamers will respond though - let's hope for the best.
Steve "awakeN" Yeager
Co-Founder/Co-Leader of Asperity Gaming