I'm just going to post a couple of things on this issue...
So Stefan's choices were:
1. Do not rollback
Whilst this option sounds rosy as no one would have lost anything. That is wrong. In the 18 hours the game was down for we had groups of people who could log in successfully and groups of people who couldn't. Those that could log in were pretty much in an uncompetitive galaxy, they had the market to themselves and could attack/op without the possible prospect of retaliation. A lot can happen in 18 hours when you have such a huge competitive advantage.
2. Rollback
An ideal option would be to rollback to just before the problems occurred, however the backup simply didn't exist with the latest being Thursday morning.
So the decision was made to rollback. Yes, people would lose the work they put in and yes, people would have more knowledge about the plans of others. But the difference is that everyone is affected by being rolled back to the same time. Whilst your enemies may have knowledge about you, you have knowledge about your enemies. It will also force families to get together and rethink their tactics, which is essential in any sort of war or conflict situation. In other words, you have to be prepared for the unexpected and even though some of you are unhappy about the situation... think of it as an unexpected twist to work around.
Either way, just like in real life, whichever decision was made people would be opposed to it and complain. It's been like that for just about everything that has happened in IC. But as administrators of this game, in difficult situations like these, we have to make informed decisions to make things fair for all and I believe that is what was done.