The thing is that good players know the best decks with the cards available. It's why the old ELO had such a prominent meta-game. The good decks contained the best cards which is why the same cards kept creeping up, cause they were the best cards.
Now the same thing is going to happen at the top of ELO, the best players are going to put together the best decks with the cards available and guess what, they're going to gravitate towards the same types of decks. Unless banning the top cards resulted in a completely even playing field with the remaining cards, which it doesn't, we're left with the same problem.
I think we'd be better off if the weaker clans were bolstered with good cards to bring them on par with some of the usual suspects and possibly the use of the top cards were limited somehow in the form of a penalty for having them in your deck to disuade overuse or a limit to how many of the top cards are allowed in your deck. Personally I think bringing the bottom up is a better strategy than bringing the top down, but that's just me.
P.S. During the course of writing this at 1150ish ELO, 3 out of the last 4 fights I've had have been against Rescue.
Actually, Mono-Rescue players tend to win every round to defeat the opp. Roots have the same strategy, too make sure that they lower the opp's life. You just need to shift your strategy to counter them. Most of the time, I played against GHEIST, Montana and Ulu Watu. There was a lot of variety I have to say. Most decks I fought were made to counter SOA. That's why I deited my strategy to counter decks like those.
Got me high enough today. Try to reach 1200 2morro.