It sounds like you needed to log one character into the wrong server and disconnect/reconnect the internet at the right time, so it seems pretty unlikely anybody banned actually did this unintentionally.
There isn’t really much need to rollback every innocent player if the exploited stuff is relatively traceable.
Ban people playing the game they bought over this? How about a simple rollback
It sounds like you needed to log one character into the wrong server and disconnect/reconnect the internet at the right time, so it seems pretty unlikely anybody banned actually did this unintentionally.
There isn’t really much need to rollback every innocent player if the exploited stuff is relatively traceable.