I too have felt the same frustration and while the trailer caught my attention I will be patient and see what else is revealed in the coming months on the game. As for purchase, I will buy the game but I do not think I will rush out and get it until after the first couple of patches - as Ubisoft has a past track record of releasing the game too soon and then the devs have to patch it quickly.
I also have to look at my PC. It is 3 years old and I have been upgrading parts of it to keep it somewhat current but it would depend on the specs for this game as to when I buy. If I need to upgrade again to run the game then I would need to do that first and then save up to buy the game (which might buy me time to get a more stable game
)