Give me Sasha's 2-fall R&J program over Shizuka's snoozefest OGM-winner any freaking day. If Sasha can get World or Olympic gold I would be surprised or astonished (respectively). Likewise I'd be surprised if she didn't consistently medal. She'll be up there. Mao is far from invincible, as her little crying spell demonstrated. She just seems invincible to us since Sasha left cause we haven't had anyone on her level...
As much as any fan doesn't want to see her embarrass herself, she will feel twice that toward herself. If she starts really training this summer and decides she can't compete at a level she is happy with, she might just quit. But again, I just do not see that happening. It's more likely she'd ramp up training and then possibly get injured. But aside from injuries, her consistency problems were not based in lack of training, they were primarily (though not entirely) psychological. That's my opinion, but it's based on careful observation of the body of evidence.
"No one would blame her for changing her mind." "oh but they will..."
Yes, "they" will and they should. Not only because she would have eaten so many of her words, but robbed the skating world of so much. Nah. It's not happening. Just remember this for next year, and get ready for the "I told you so's" because they will be frequent and probably not very merciful.

(After how many times I've had to defend Sasha, I'll deserve my day in the sun...)