1. It's difficult to answer this as these aren't all statements that I've made about the game, but I'll try.
2. Xsyon should be an open world, but not with attacking or destroying anything at all times.
3. Structures should have a level of safety, depending on defenses and choices made by players (alliances, choice to war or not etc.).
4. Siege mechanics have not been planned out yet. This was not part of the original design, and as I've stated before, it's something I'd like to add as many players have requested this. I want to first examine other games that successfully deal with siege systems.
5. Yes, you should be able to make peace.
6. Achievements should server different purposes, whether they provide something useful or are just for bragging rights.
7. Enemies should be formidable (and we will make creatures stronger soon, they are increasing in power, but not fast enough).
8. Xsyon should be a zone free seamless world.
9. The world should change dynamically, as determined by players.
10. Attaining 'victory' and maintaining safe zones through hard work (I think that's what you're getting at) is on the table.