Sadly It seems gwent is falling in that black hole of games where constant rotation of x,y,z happens which is bad. Once people see something strong they all flock to it, probably because they don't care about lore and "liking" a faction but only winning.
I like SK and played them when they were not the top faction and all I wanted was balance, when everyone and their dog played NG or STspell.
Now it's SK everywhere and Dagon. Don't like it either, even if the faction that I like playing is strong, that's not the point. There must be variety or people will just abandon the game.
If it all goes down to 1 week this faction, next week (patch) the other, it's extremely boring and non-fun style of play.
And no, it's not about card games, it's about balancing and different options.
There are many things developers can do to prevent this mass movement from 1 faction to another.
1. Add A LOT of new cards with many various crossing effects to make it hard to just compose 1 deck that stomps them all.
2. Don't make significantly strong one sided cards that everyone would use or very weak that nobody would use. Gwent is full of dead cards atm that nobody uses and several super strong cards that everyone uses.
3. Make cards with surprising effects, that counter a lot of different things based on match development and player choice, no need for all cards to synergize within a faction, this leads to funneling and super-deck building, that everyone starts to use.
4. Add "loyalty" bonuses for players sticking mostly with a faction (through stronger or weaker times).
...
I guess many people can give many ideas and am sure the devs can come up with great ideas, but they need to act fast.
I kind of don't feel inclined to log in and play anymore, seeing all the same decks and cards and knowing how a game will go and just come down to the better draw one has, it's boring.
Even if they nerf bears, for example and bring down SK a notch, what next? NR next round? Monsters?
It's gonna be the same with a different color.