I'd buy...
Same with me. Speaking of that, I, too, would love to have the store back. I never actually purchased anything from the old store, but I could definitely see myself buying things related to Second Son, inFAMOUS 2, or anything else Sucker Punch related.
While I was surprised with the new logo, considering that you
have had the old one, or at least a very similar one, for such a long time, I liked it. It's clean, smaller, and just seems more professional.
It's probably easier to hide in the game as an Easter Egg as well.