I think I've explained that several times but I'll do it again just for you.
In the past, WifS has given extended notice to big changes. I think they do this to gauge user reaction so, if they need/want to, they can adjust. They may not have made the decision and/or aren't sure what they want/can do yet. With the exception of a few, my speculation of ADV projecting IFA/domestic prospects has been met with "Meh, whatever. I'll figure it out." However, those few have been very vocal with "OMG!!! THIS WILL RUIN THE GAME!!!!" Either way, an immediate response isn't necessary because there are very few worlds(as in 1, Pete Rose) that filled/will fill since the announcement on Thursday afternoon.
Or, quite possibly, they haven't looked at this thread since Friday.