Personally, I think that the current look, while not ugly per se, has too much of a digital, modern aesthetic to it and doesn't fit the Witcher world.
The original board from The Witcher 3 fits the world better and it's also not as cluttered.
But why stop there? We could have several different boards, boards that mimic the look of a simple, piss-poor tavern, but we could also have fancier boards that mimic tables in, say Passiflora (like in the high-stakes tournament) or in some royal palace. Also elven boards, dwarven boards, Nilfgaardian boards, Skelliger boards, you name it.
P.S: Oh, and I'm definitely looking forward to hearing what other new music this game will have. I hope it will also fit the medieval aesthetic, just like the original gwent music did (which are awesome and also hope they make a comeback in this game, along with new ones). After all, aesthetic and atmosphere isn't just about looks, music is essential too.
Yeah, I can't say I'm a huge fan of the new desgin for the boards. I think the team have chosen to emulate other boards from other similar games, so as to draw in audiences from those games. While this isn't a bad thing, it doesn't quite fit with the unique atmosphere of the GWENT world and is a bit disjointed and jarring for players coming from the original Witcher games.
Maybe, at the very least, there could be some reconsideration in the scheme of the UI, since it's such an important aspect of this sort of game. Maybe take the best of both worlds - keep the best of what they have now and throw on a more medieval theme. While, of course, keeping it simple.
And I quite like the idea of different themes. Actually, maybe there are different themes depending on where the player is playing the game in the stories? Who knows.
I love the new board, I think it is an enhancement in every way. The game looks updated and fresh. That being said, I like the idea about faction specific tables. Maybe a retro Gwent table..tavern style. There is so much that can be done, but I believe CDPR is all over it. This company has never let me down yet.