From what I'm hearing, the deal is now Kris Humphries, Gerald Wallace, MarShon Brooks, a signed-and-traded Keith Bogans, Kris Joseph, three first-round draft picks (2014, 2016, 2018), and the right to swap first-round picks in 2017 to the Boston Celtics for Kevin Garnett, Paul Pierce, and Jason Terry. So Reggie Evans is still a Net.
I think Pierce can still play at a high level, but he's not 'the' guy anymore. Which is fine, because they won't need him to be that in Brooklyn.
I personally have very little interest in D-12 at this time. The Lakers expected Howard to be the defensive/rebounding/shot blocker for them, but they didn't get that. And I think he's immature.