I know it's probably an outrageous and rational suggestion, but perhaps this means they will think about separating paid for/earned slots from the online store entirely? Surely they could record the number of paid for/earned slots available at anytime to the actual account, instead of having to look this up at the online store each and every time you try and access a slot.
Seriously, this issue is pretty embarrassing. It happened to me the other week and I couldn't recreate an alt until the next day because of this. Now it's happening and keeping people from enjoying GR on launch day.
Honestly, unless there's a pretty good reason that this (the number of slots avail total) cannot be stored in our account info accessed at login, I would hope this change is made.