There's a core playerbase of longterm players who got a zillion scraps with HC and have every card in the game and will be able to craft every card from future expansions. These players can instantly make any deck that seems interesting or is on top of the current meta.
These players also don't understand how miserable the play experience can be for new players or returning players with small collections. Players like this can craft a couple of low tier decks or they can craft one pretty good deck that then turns to shit when the next round of balance changes hit. For these players it can take a really long time and a huge amount of game play to get the scraps needed to craft the gold cards to make a new deck.
Meanwhile they trudge along getting slaughtered. I'm a very low rank player and lately I just get demolished by highly tuned decks taking advantage of the newest changes. It's totally miserable to get hit for 1 damage 40 or 50 times a round. You just sit there and feel like shit putting the next card on the board that will be a target for the next bunch of 1 damage pings. Or your opponent plays some crazy-ass combo where he suddenly gains a massive amount of points you can't possibly overcome.
Gwent has no future because it's just not fun to play unless you are a long-term player who already has most all the cards. The new player experience is painful. There's never been a game that I wanted to like as much as I want to like Gwent. I've probably re-started a dozen times. But it's just not fun to play and I'm not willing to slog through hundreds of hours of no-fun in order to catch up to the guys who are having a good time.
If it's any consolation being the long term player with all of the cards isn't as much fun as one would think. Game still gets stale really fast, imo due to the bad balancing that usually results in a just a few decks and leaders being playable.