I just finished a dominion match when I noticed that the map was blurry when I was going to deploy war assets. I thought that leaving the match and starting a new one would fix it and it didn't. Then I tried playing an match and it was still blurry. I managed to finish that entire match and once it was over it, everything was still blurry. Restarting the game is the only thing that works.
Thank you! I would recommend opening a ticket about this at https://support.ubi.com and including your Msinfo and DxDiag files as attachments to help our support agents investigate the problem. For a short-term fix, restarting should work (as you already discovered).