I doubt it. Ayaka's become quite a good leader, and while I disliked her a lot when S/mileage started out she's really grown and I love her now.
Though, gotta say something in relation to the comment in the concert thread.
Tsunku did say during his announcement, that if needed the new member/s will undergo training for 3-6 months and thus be sub member/s for a while, which would be being members of S/mileage but not take part in all activities as they have training to be able to keep the quality up. But maybe it won't be needed, so maybe he'll just go and say "Here's the new member/s and have them join 8/14." Now this is the last day of the H!P summer tour. I don't know if he meant that to 100% because... well, it's Tsunku. But just figured I'd mention it that he
did mention a date. But it all depends on who he chose to be the new member/s.