That's a really bad solution.
Stop the simulations and fix the problem as it was know in advance. Easy.
Furthermore, as they knew it a couple of days in advance the least they could have made an announcement (in red of course) where they notified about this problem.
It was not known a couple of days in advance. Taking the posts above at face value, it looks like the time was at least as short as 14 hours, and probably less in some countries. That's not enough time to expect affected users to reset their lineups, IMO.