I beat the tailor in Gwent and it said I received Yaevinn, but it doesn't appear in my deck (yes I'm looking in the correct faction, and I triple checked all of them regardless). I've tried it twice more to no avail, so I'll put on hold my journey to become the best Gwent player in the world.

Also, I don't know if this is a problem or not, but I have to do a quest for the other druid before he gives me the option of playing him. It would make sense if this were the case given the guy's rather mean disposition, but it still is something that may or may not be an issue.

Lastly, and unrelated to the topic at hand, alternate signs still not casting because holding down Q on the keyboard does nothing but the first kind of sign, this is still the case as of 1.04. And the freezing issue still remains after 1.04 and it may have gotten worse.

My problem is a gwent card you should get on a side quest in Blood & Wine. Quest is "Till Death do you part".

That side quest does not give you Blood and Wine Gwent cards, it gives you cards from the main set, so if you already have them you get nothing. A lot of people, me included, thought this was bugged, but it isn't, you still can get all 19 Skellige cards without this quest.