We've been doing block three at my store in the Shwa for at least three months. It's actually proven quite interesting to see the mix of toons being used as opposed to block 2 where everyone used the same thing every week. Example:
More often than not the starting lineup for characters played by folks at tournies:
Shajir: Evil Ibuki/Order Yun Seung mill/aggro (depending on the day and deck)
AwesomeDhalsim: Evil Ibuki/J.Talbain (at the very end of our block 2 lives)
Link: Xangiua in any incarnation
Me: All Alex with fire attacks
Adam (who's forum name I dunno): Water Seung Mina rush
Andrew (again who's forum name i dunno): Order Yun Seung aggro
Folks like Morning Demon and Loki 5k when able to play usually varied it up. Near the end of Block 2 Loki started to play a Block 3 Akuma deck, saying that every major tourney from then on out was block 3, and it kinda shifted all our thoughts untill eventually we were all experimenting with various block three decks. As such, our tourney spread a couple of weeks ago looked like this:
AwesomeDhalsim: J.Talbain
Me: Yoshitora
Andrew: Terry
Adam: Guy
Link: Zi Mei (the ballsy guy played Kazuki last week)
As you can see, block three has blessed us with a plethora of good characters, and we're experimenting with a LOT of them. Sir Shajir built a Kyoshiro deck off Order that drew an INSANE amount of cards and then Self Sacraficed his opponant's board away. Loki is working on fine tuning a Talbain deck until he gets b%^&ed, while Morning Demon is builting up a Basara deck that quite frankly scares the bejesus outta me. We also have a new player who shows up when he can playing a Sagat deck. So needless to say, our meta is actually doing fairly strong, and I fully think it's because of the block three changeover. A lot of the junk from block two is gone, namely stuff like the Curse Broken, SusieQ (YAY NO MORE IBUKI!), and Chain Throw/Absurd combos have opened up the meta quite a bit. Symbols such as Earth, Chaos and *gasp* Good/Void are finally being considored mid tier given the fact their primary abilities (Chaos- Momentum Gen, Good the anti meta symbol, Void discard etc etc) aren't being stopped by one or two power cards.
Now don't get me wrong, there are a LOT of problems with block three, many of which have been discussed on this board, mostly by me. But I think with whatever SotG we get next, and the next wave of errata/ba%^&ngs we get, the game will be fixed just that little bit more.
Cheers,
Brad