This is actually a really interesting question.
Mao's personality does not seem to be the one to choose the "safer" or "easier" route. She seems to relish taking on difficult challenges, and it is startling how often she achieves what she sets her mind to. e.g. Three-3A competitions!
However, I say yes. And it's not for the purpose of "taking it easy", or wanting to secure some medals or even a chance to go to Worlds 2011. I just think it is a better methodological strategy.
When I want to retrain something and go back to Square One, I make sure I get the easy stuff down PERFECTLY. Then, and only then, do I allow myself to tackle things that are more difficult/complex. Mao wants to revamp her jumping technique starting from the basics. Right now, I do think she should make sure she can go through a competition cleanly with only jumps like the 3T, 3Lo (her strongest), and maybe 3F or 3S (easier generally, plus she has done them well in the past.) My reasoning is that her 3T and 3Lo do not need too much reworking; her 3F probably needs only minimal mental supervision and I don't know whether her 3S is problematic or not (some people say it's not a problem for her, others say she sometimes skips it because it's not her favourite or best, whatever) but it's one of the so-called easier triples.
Now, I did entertain the idea of wanting her to continue to maintain her 3A while working on keeping her strong basics intact and consistent. She has done it fairly consistently in the last season. However, no. She executes 3A's beautifully, but I admit I don't like her entry into them (she slows down a lot), and they seem to be draining on her energy and time. She should devote her technique-revamp-season to her other jumps, including better flow on entry and landing.
I don't claim to be an expert in figure skating coaching or training, but this is what I think based on what I can see...