Very true. However, in addition to having the senior skater (that changes when we look at the juniors and even arguably when we look at Liza T) with the most improvements, no one under Eteri has regressed. Anna has at worst maintained the same level. And also, Eteri doesn't tend to have such an imbalance of effort into her skaters - as Evgenia will attest too. (Even when Eteri has favourites she doesn't stop letting the others try to beat her favourite and puts the same level of effort into their improvement as everyone else which is something we haven't seen with Plushenko.) That said, his work with Sasha is remarkable! However, it's not like that talent wasn't there before and Sasha wasn't already phenomenal under Eteri. Also this isn't the first skater whose struggled under Plushy - he did essentially ruin Anastasiia T's career by forcing her to train quads before she was ready. (Although, I will admit that that's he's not alone in this.) It is however worrying, that everyone other than Sasha has regressed. And even Sasha got injured and isn't able to train to the level she was before.
Also, Zhilina's mother isn't a new entity. She was there under Eteri and I don't think Eteri would allow for the confusion that happened with her SP.
Alina yes, however, she's not the only one who lost her jumps over the break - everyone else did too. (Anna, Kamila, etc, all had to get them back and did.) As for chronic injuries, well that may be true; however, you're deluding yourself if you think she's the only one. Sasha also got injured and wasn't able to train or perform certain jumps and it was a very serious injury which she's still recovering from. As for COVID, Liza T definitely had it and Anna probably did (depending on sources.) Also like Aliona, Anna got pneumonia as well.
I will agree though that a shortened, pandemic-riddled season makes it hard to judge;however, I'll argue that needs to apply to everyone then. All skaters and all coaches.