I can comment more specifically for That Authoring Group right now.
As you may know, Noble is basically gone. I mean, he's still around, but his "real" job has become much more time-intensive, and he isn't able to help out with TAG in a massive capacity (hence why I'm representing TAG with this post). Adrianus and I will be the TAG community outreach people (I'll probably start posting with the TAG account soon enough). We also have a ton of members who are either ridiculously busy or have sort of dropped out entirely, so not only are we VERY down on manpower, but because of that, we're focusing on intensive internal restructuring to make the most efficient use of the little manpower we have. The hardest part is finding someone to test at creators' as much as Noble did, since the only way to get songs tested (and by extension approved) is to test others' songs in return. But we're figuring it out.
I know I've already stated that TAG isn't going anywhere anytime soon, but hopefully this will provide a little more insight into why it's taking us a while to get back up to steam.