After testing the update consistently now, here is my opinion about it.
Before I start, my opinion is averall good but there is still some room for improvement and a few things I don't understand.
But let's start form the beggining and give CDPR a big thumb up about the new UI and the visual aspect of the game.
And yes, there is some peoples complaining about it, honestly it doesn't make sense to me. The game is a LOT more playable as it is now, everything is more intuitive, now you see all of your card before mulliganing them, the new visual effects appearing on the battlefield are cooler. It's day and night compared with the previous formula, even though there is a few things that could be changed/fixed but I'll come back to that.
Also, there is a lot of cards that I love, most of the new one are awesome and the high roll ones are not good enough to be an issue (appart maybe for one or two but not to the point of game breaking, at least I don't think so).
Putting the collection and deck builder all tougether is awesome, it's 1OOO times more convinient to make your deck and the averall look of this part is great too. Really good job made by CDPR.
Now, let's jump into the negatives.
First of all, I have no issue with the thumbnails of multi effect spells being now all the same (for example Rally as the same art as Clear sky when you make your choice) but it's a bit confusing because the game present you multiple arts that are exactly the same but with different effects. It may be wiser to just change the way multiple option are displayed to the player (the best example is Auguara, the first time you play her she pops a screen with 4 copies of the same Augura...fairly confusing for someone who's not used to the game).
About the gameplay, when I think some change about the different cards are clever and useful, some others are questionable imo.
Let's take an exemple, Battlemaiden used to deal 2 damage to a wounded unit upon appearing on the board and call a friend, they can't anymore....why? Honestly this unit was nowhere mear OP and was one of the most important tools for Harald. And just when Harald was about to be playable too (I'm nt saying he's not going too but I just don't understand this change at all).
The opposite applies for units like Nekker warriors, for example, why buffing them? The consume deck was already one of the strongest in the meta yet you throw a few buffs at them. I don't exactly understand the reasoning behind that.
Finally, there is a few bugs and some textboxes are not accurate. For example Siegerdrifa doesn't resurrect young berserkers, why? Is Svlalbold not a clan?
Spotters refused to trigger their ability (at all, mine just came into play as a vanilla 4, giving me no choice when I had one unit revealed in my hand and my opponent had 5...).
Second and third Alba pikeman don't trigger standard bearer ability. Considering the wording in this patch, they should (bearer boost a unit when a unit is PLAYED, Alba pikeman's ability is "summon all copies of this unit" and when you higlight the word "summon" the game replies "PLAY automatically from the deck").
Either it's a bug or the textbox of the bearer should be changed to "played from your hand" like before.
I must reconsider, if I will play it... 
