unfortunately, if the pa tried to take control of gaza, it would just restart the stalled civil war. the palestinian authority has absolutely no democratic legitimacy in gaza, and should have called an election in the west bank decades ago at this point. israel cannot allow a civil war to erupt in gaza, so an attempt by fatah to take control of gaza will just lead to more bombing in the west bank.
gaza needs to be placed under a foreign occupying force - and that force could include egyptians and turks. sure. - until some very serious de-radicalization can be enforced, and fresh elections can be held.
fatah must be told in no uncertain terms that they are not welcome in gaza and violently kept out of it, if required.