I don't think so, this is the only raiding tier I've cared about since ICC. MSV in particular I thought was really well designed in terms of encounters (Except Will of the Emperor which I just found boring other than dodging their special attacks). Heart of Fear is fun except for that dickbag Ambershaper (seriously that fight sucks on heroic). And Terrace is just annoying in general to me, other than Sha of Fear which is alright.
I think guilds fall apart naturally because it takes a lot of leadership to effectively run a guild properly and it's hard to satiate the needs of 9 other or 24 other people who all want to do different things.