Well, if he's SO important Hamas for sure would trade him for this Shalit guy. Let's see it in the course of nearest days. ;) Thought I think that the true reason behind all this is as always money and control: under Sisi supervision Gazan power plant could operate without Israeli supplied fuel. That means that Israeli could not control the single power source in the strip.
Police arrest 18-year-old Palestinian suspected in Old City stabbing (Haaretz)
from the article: 'Hamas weapons capability increased four-fold over last five years'