I don't think Evgenia has been disrespectful in any way, she thanked Sambo70 and Eteri for everything they've done for her, but the moment you leave, you're alone, so Evgenia needed to find a new coach immediately to see if the move is worth it.
Evgenia saw this happening for other skaters, not always ending up well, so i think she planned this in advance cause she wanted to make it right, especially considering that working abroad while still competing for Russia is difficult.
I'm concerned for Polina cause we don't know who is going to be her new coach, honestly i think she should go to Mishin to keep her beautiful technique, otherwise work abroad.