Having had time to think, I feel like the best thing that could happen to encourage community buy in would be a staged roll out by feature. If this is dropped on us like a feature pack, it'll feel pretty bad, but if guilds get the tools to adjust to the change and ensure their people are ready for it, I think the changes overall could be really good. For example; drop the WvW guild assignation feature (perhaps even with auto-rep-over while in WvW) in April, then the Alliance system in May. Give people a month or so to set themselves up, while delivering ANet some initial adoption data for Alliance buy-ins, on which to base their first algorithm deployment. Once the community is ready, decide whether to go ahead with the new Worlds system - or, if it really doesn't work at all, just leave the new tools out there for players to use anyway, because those tools will be good news whether the new Worlds system is in place or not. Buy-in and adoption for this will be a really important indicator of whether it'll help or harm things.