I'm relatively new to this game, and unfortunately, this still seems to be a problem. In the short time I've been playing, nearly 1/2 of the opponents I'm facing are playing NR with decks built around the Siege scenario card, which is insanely OP in my opinion.
"Well, you can just take cards that destroy artifacts" you might say. True, but how can you say that a particular deck build is not OP when at least 1/3rd of players are using the same build and I'm forced to build ANY OTHER deck SPECIFICALLY around countering 1 card. Then I'm left hoping that I draw my artifact destruction card to counter his Siege card.
This really needs to be addressed. Any meta where a huge number of players are using the exact same build because it's nearly unbeatable is a BIG problem.