I probably wouldn't have upgraded. No one knows when the next JB will ever come out, if ever. And no matter how Apple improves stock iOS it still wouldn't be worth the trade-offs. I probably would switch to Android if I ever had to go back to stock iOS. In fact, having a usable JB is the probably the only major reason why I haven't moved to an Android device yet.
Correct me if I'm wrong, but it isn't the lack of exploits that is preventing a current JB, is it? I thought there were plenty of proof-of-concept videos floating around, but no one has bothered to package it into a proper JB for the masses. Without this widespread adoption, development for tweaks and apps will continue to slow, leading to the death of the scene. Until then they would have to pry my JB device from my cold lifeless hands before forcing me to upgrade lol.