rollback will do more harm. Most players are considering a holiday regime. The game is no longer fun, this phase of the game is about the motivation of the players and the rollback is not really motivating.
Would it be motivating for you if it was your WW demolished from lev81 to 0 because of the bug? Rollback is the only way to have fair results that reflect effort and money players have put in this game.
I was told that you indeed reported this and that it is still being investigated.
So let them figure out what is going on and they will let you know.
If it is a bug then it will get fixed and if troops died due to a bug then they will get replaced.
Hopefully they will have it figured out soon.
Now that the WW got destroyed because of lacking defence replacing the troops will not change anything. Rolling server back to the point before the troops started dying because of the bug is the only solution. If that does not happen you will not need servers for Poland anymore.