The whole "roster re-building" has already been the biggest deterrent to re-starting guilds, but the guild advancement system seems to me to present a MUCH huger wall. I mean, resetting guild experience to zero, perks to zero, rewards to zero, ... it's like hard-deleting all your epics just for fun some afternoon. So makes me think that going forward there will be a lot less guild churn than in the past. People might transfer the leadership of the guild around, but the notion of, say, Your Bummed just tossing in the towel because of a leadership spat just seems zero. Although we can hope.
Anyhow, though, rather than kicking toons once at a time, couldn't Shagz just /gdisband in one stroke? I thought that Barnaby once did that as a joke with A-team. But can't say that I ever tested that functionality myself, that's for sure...