I think the issue is that we have quite a few powerhouse cards that were recently introduced, so UR is going through a bit of a transitional period right now. Most weeks go like this:
Player in a Big-Time guild: "I want to play with some of the new cards, they feel pretty OP! Let's go ahead and vote to unban a bunch of them!"
Rest of Big-Time guild: "GREAT IDEA!"
...A few weeks later:
Player in a Big-Time guild: "I am sick of seeing all the new cards, they feel pretty OP. Let's go ahead and vote to ban them all!"
Rest of Big-Time guild: "GREAT IDEA!"
And of course every time you see a week with confusing meta, a bunch of players decide to cram as many 50% win cards into their deck as they can... Blissfully unaware that having 2 or 3 of those cards doesn't drive their win odds above 50% unless they play well.
I think that this will even out a bit as
ELO Karrions, er... I mean, carries on.
And I am happy to report that I'm still doing fine with Junta/
Vortex (or would be, if I could pay attention instead of playing UR every time my poor achy hands need 3 minutes away from work...)