I can't say much about how the game is set up and what's actually possible for them to do, but it seems like deducting 50 myth from a character and unlocking a turn of coil for them should be doable. Of course they'd have to do it for up to 8 people per instance in many cases. Returning an item that you never actually possessed doesn't really seem like a workable solution as a GM or other would just have to take a player's word that the other players were going to pass, or contact all the players involved to ensure they would have passed. The situation gets confusing and muddy very quickly unless SE has enough people working on these specific issues and a solid process on how to handle these cases.

Unfortunately, while I think SE are doing the right thing by first concentrating on making sure the servers don't crash like this again, they are either overly optimistic in their fixes or completely apathetic to the problems individuals have when these crashes happen.