By the activity that is in the game I wouldn't say that people is getting bored, maybe is some frustrating for the newbies, but this game can be played in many formats, some of them that aren't so expensive.
It just started and isn't a secret that the development team hasn't the same resources that Blizzard has, I think that is unfair to compare Hearstone with Steem Monsters, anyways give the game some more time.
I think that the best is still to come.
You can get bored in the future. And it is pleasing to hear other opinions it is good to emphasize that the game of Gwent was a mini game elaborated with a very low budget. Said by its creators.