Well, I've noticed with the guys and the quad - those who put it in or take it out based on whether or no they think they "need" it for any given competition... never gain consistency with it. If you want to go for it - you really have to go for it.
It depends on what the goals are for this season. Win as much as possible? Or get the 3A in there - and get it as consistent as possible? Is the strategy short term - or long term?
If the 3A is consistent in practice - which we don't know - then it would be in Liza's head. There's a mental hurdle to that one more revolution - knowing/thinking you can do it. When it comes to jumps, I believe Papa Mishin knows what he is doing. I don't think he would push it if he thought Liza wasn't ready. Now, no person is infallible - and it might be a mistake. But he's got tons of experience, and so, I trust him.
Anyway, I'm a Liza fan - and I'm in for the ride... bumpy or no.
ETA - On the music. Powerful music is always very unforgiving. If you skate with Power - it enhances your skating. But if you don't... the difference between the skating and the music will be very noticeable. You need Power, Command, Charisma... And Liza has these things - but when she's not "on", of course, it will be glaring. But, you need to take your chances - you can't just "play it safe".