Whether or not the PA's actions facilitated the deal, Hamas scores a major win. I agree that Abbas's unilateral actions had a huge impact on this deal, but that doesn't change the fact that Hamas made it happen in the ned. It was widely known that the PA strongly opposed any Israeli deal with Hamas to bolster their own position as the sole rightful leaders of the Palestinians.
Palestinian man suffers light wounds from rocks thrown by Jewish men in Jerusalem (Haaretz)
from the article: Israel and Hamas are both winners and losers in Shalit swap deal