I liked this game so much that I have spent +300 hours on it. When I reached Pro Rank a few months ago I felt like I had accomplished something of great difficulty.
The game had a lot going for it even though it was never really balanced but right now it's astonishingly unbalanced and boring.
I've been playing old decks as of late which had granted me fair success in the past, but my winrate has now dropped to a meagre 20%. It's really frustrating.
I fully understand that some decks can be (and must be) a bit more powerful than others (depending on their synergies and the player's deckbuilding skills) but it's unacceptable for a deck with good archetype synergy to perform as poorly as they have been especially since the last expansion.
SK is so powerful now that in the last match I played against it I was beaten in round 3 despite having 2 card advantage and a good hand. Ridiculous.
As of now, it's more about your deck strength than anything else. I would say 75% deck strength, 15 % luck and 10 % skill.
This is my review of Gwent in its current state:
Art - 9/10
Balance and consistency of cards and abilities - 2/10
Fun - 4/10
Lore - 7/10
Interface (on PC) - 8/10
Basic concept of the game (factions, archetypes, abilities, rounds, mulligans....) - 8/10
Reward system and progression - 6/10
Bug-free mechanics - 7/10 (some bugs appear when destroying/spawning units if the row is or will be full, for example)
Different game modes - 5/10
Matchmaking - 7/10 (too slow now)
Sadly, I'm leaving the game, I've grown so tired of it already.