That Team 4 failed to deliver was something that wasn't intended. This messed things up considerably when they had to move all girls to other teams to save them. The intention to have four teams to promote KKS to ended with ZERO teams.
It is easy to see how badly management want Okada Nana, Kojima Mako, Nishino Miki etc to get out there... but there are no free spots even if Mariko, Itano and Sayaka graduates. What makes things worse, they bring in sister-group members like Jurina, Milky, Fuuchan, Haruppi etc to steal the spotlight from KKS.
To be honest... I think management wish that more girls, full and KKS, choose to graduate from AKB. To have a bit higher rotation of girls.
From a business prespective, it is OK to sacrifice a few KKS and low ranked full members for the sake of continued success... sounds crappy though.
hmmm...
A possible look at the most popular girls of the 48-family in a not too distant future? You will have opinions about who will graduate and who will stay, etc, but that is not really the point, sister-groups have the advantage at the moment. I think we will see Oshima, Kojima and Yukirin announce their graduations before any of these girls in the picture does.
This draft is not about finding another Acchan, Meru, Jo or Jurina to develop over many years. They are hoping for another Sayanee, a bit older and ready to go out of the box. Still it takes time to build up a strong fanbase whoever you are.
^
I don't think they will be promised anything. They seem to be restricted to the team they got drafted for. If you got drafted for Team A it is Team A and nothing else.