Perhaps, but if her body/mind can no longer do it (or at least do it with ease), it could just be like learning it all over again. I'm not a skater but I've had similar experiences where I've had to deal with this.
It could be... but I believe in muscle memory, especially so amongst elite-level athletes. I think over the past few years for Michelle, having the 3/3s has been nice to have but not absolutely required to stay on top.
There are talks that Sasha hasn't been skating at the rink where she usually trains with Nicks since the first of February. Nicks has been there training other skaters. Nobody seems to know where she is, it all under warps.