For day 1 I'd say the devs are saying that they knew that they've gone the wrong way with the game, and hope to start a new beginning that people will like.
Also praising that it's been a good run with Allods Online, that it was wonderful.
Day 2 is where devs hint to you that 10.0 is coming closer by telling you that the darkness is coming closer (Nihaz's darkness), but also subtly telling us we're not good listeners
On day 3 it's being made clear where we will play 10.0: on a different earth, under a different sky.
Also hinting thatb our "deeds" will be gradually erased - I think this is a nod towards hoping all the bad the devs have done before to the game, that they hope people will forget it by playing 10.0 over the course of time. I'd think about all the CS items they have implemented that made so many players disappear (leave/quit).
On day 4 they try to relax the player by telling him/her that everything will be alright, and that we're the main character. Sadly ALL of us are the main characters so it kinda broke it for me that I am not the special one, haha.
On day 5 they hint again about 10.0's new world, "welcoming everyone" is telling me also about the new players/returning players, where CS will be non-existant/reset, players will feel welcome and not behind, in slack.
Also stating that everything that happens for a reason, was made so due to you, or for you.
On day 7 they hint again about 10.0 by trying to build up hype over what will happen. "Our old names will mean nothing soon, you'll see" tells me that again, they hope to clear their old names, and tags people gave "p2w" to the game, to have a new beginning and start.
On day 8 it's a repeating prophecy from day 1.
On day 9 it tells us not to be scared of darkness. That it's something on our side. That 10.0 is very near, meaning it's the next big thing as update to come. at the same time saying it's far away, makes me think that they want to make players hyped and curious to 10.0.
Day 10 is a repeating prophecy of day 2.
Day 11 is a repeating prophecy of day 4.