It's not a binary choice. Israel could keep some forces in Gaza - a much smaller force than what was used in the first few months of the ground campaign - and focus the majority of forces in Lebanon.
I don't see force readiness reports. I hope Israeli officials do, and make the right decisions.
Do you have a source for that command staff admission?
There are still hostages in Gaza. Until they're either released or proven dead I would guess Gaza would still be counted as "unresolved".