Why invade Gaza? The Pals are killing each other. Their society has totally degenerated into tribal in fighting. The IDF can go back to targeted killings and bombings of infrastructure from the air, artillery shelling, bombardment from the sea, limited raids and pull outs, closing of the crossings, blocking exports and imports, cutting off of electricity and water, and making life even more uncomfortable for the terrorists in Gaza. The communities next to Gaza could fire their own missiles back into Gaza and give the Pals a taste of their own terror back to them. A massive ground invasion into Gaza just is not required at the moment.
4.2-scale earthquake felt in Dead Sea, Jerusalem area (Haaretz)
from the article: Gov't to give Gaza arms smuggling top priority in diplomatic meetings