If there would be an easy solution, we would have had peace in the Middle East decades ago and the people having reached that having earned the Nobel price for Peace. Israel will do mostly what they feel is necessary for their survival right now, and give a shit about everything else. An unitary state with them is unlikely, they would want to turn this from a Jewish state into an Islamic state, so not happening.
What would be necessary is a de-radicalisation of the Palestinian population. The conflict there is already spanning over many generations, so it would take at least one generation to reach that. But since the Arabs do know how to keep a grudge alive, this is quite utopic. This process would need to start either internally, or you could try Chinese reeducation camp styles like they do with the Uigurs, to force this upon them. This is also why Hamas is so against of Israel having diplomatic relationships with countries like Saudi Arabia, because this really normalises many things.
So what we will most likely see in the future is Gaza being a shithole, but Israel keeping even a stricter control about it if seen necessary. Aside that they will happily hand over for the more relaxed times over ruling Gaza to whoever wants to have it. For reasons I can do understand pretty clear most Arab countries there, like Qatar, Egypt or Saudi Arabia don't want to have to rule over the Palestinians.
The thing is that many Palestians are no sensible actors, they are fanatics. So you cannot deal with them in a sensible way.
I mean its not without reason why many American right wing nut cases do favor as solution to drop a bomb and make a car park out of it. Would it work? Yes, most likely. Is it an easy solution? Yes. Would it be a good solution? Nope.