I think it would depend more on MCC on Steam if it releases before Halo: Infinite. We already know what the MCC games are all about, but they're gonna have to sell us hard with Halo: Infinite because it's an unknown quantity. I don't think anyone here is ready to fork over the cash for yet another false promise, or at least not in the beginning.
Anyway, regarding PC. I think the problem with ElDewrito was because of its hard to obtain status, despite being the best Halo game to have ever been on PC. Though if you give people an actual, legit Halo game on PC, then they will come in droves. I mean, they literally spammed the 343i office with pizza because of the Reach on PC announcement. People really care about this.
Will that affect 343iCF? Obviously yes, because we're in the top of the searches. If Halo gets another boom then there will be a load of people looking up 343i. People will come here thinking we're someone we're not, which I've always thought was wrong. If we were called anything else nobody would care as much.
Though regardless of a name change, I think the community would grow enough to actually be bolstered again. However, it'd have to depend on the series being strong on its own without this community. If it's not then I guess we're just gonna be like this for good.