You act like this wasn't going to happen. An online TCG made by the same developers as LoL. Literally has so much backing by this huge company, a huge player base will instantly come and try it, and of course, we all immediately resort to all we know from other OTCGs, net/meta deck spam. Besides, the closed beta had given a lot of streamers time to find good decks, and now they're just being popularized on websites to these new players, which means you get more net deck spam. I mean, it's really not Riot's fault either, that's just how all TCG communities will be.