I dont think its a balance-unbalance situation or even a deck one. We are playing with the same resources and rules. If someone is using a cheat or a hack different story. There are cards that are useless and other that they are overpowered. It happens on every game and this is no different. I am a bit tired in the sense of what now? I got all the cards. I made it to pro rank a couple of seasons in a row but I have no intention or ambition going on a tournament. I enjoy the game but I feel there is something missing for the casual players. I think the decks and factions are quite balanced. I can struggle vs lockdown or SK, but when I play lockdown I can struggle vs ST. And vice versa. I have easily beaten lockdown and lippy. So I get a fairly balanced loss/win ratio. Bottom line the deck doesn't make the player. You need to put some effort and thinking on it.
I think the problem lies with some lack of imagination or block from the developers side. Unless they want to convert it to complete esport competition in which case they are on the right track but they will end up with a 3 digit client base.