What changed about Arena Ranking?

[Friedrich Psitalon]

So forgive me for the stupid question, because I'm sure the answer will be "DOH" in quality....

I'm not an ultra-neophyte, but I still play bronze league because I have to farm False Gods a whole heck of a lot more. Normally, a bronze league deck that goes around 50% goes out after three days at most, and it's never ranked above 300 - usually more like 450 and then quickly out the door.

I've got one that I threw together because I never back down from a challenge, but I hardly expected my Procrastination-based deck to do well.
Here's the thing, though: it's currently 30W/40L and it's ranked 130 as of right now.

Is something busted? I do not understand. Help?

[willng3]

People are grinding the heck out of Bronze League right now to win new Shards from the bonus spins.  Thus, there are some people who have nearly 80 losses but are still in the top 300.  The amount of rating you receive each day is also dynamic which I suppose helps a bit, but isn't really the main factor here.

[prostouser]

I think that release of version 1.29 is main factor to all the changes. (c) Cpt
1. As willng3 said there is a  lot more of experienced raging fully-upped grinders in silver and bonze  this days. Therefore in big game AI vs Players the first side is having hard time and lower win rate.
2. Luck does matter in Arena
3. You have created better (more competitive) deck than other remaining bronze players. Face it

[Polari]

People are grinding the heck out of Bronze League right now to win new Shards from the bonus spins.  Thus, there are some people who have nearly 80 losses but are still in the top 300.  The amount of rating you receive each day is also dynamic which I suppose helps a bit, but isn't really the main factor here.

This. Just check the leaderboards: right now only top40 has over 50% wins.