More could be said on various fronts, the Hannibal option, for example, which ties in with one of your examples. Unclear ratio of civilians/reservists KIA on that date, being another.
Some tangential points being that Israhell was concentrating on protecting settlers on the West Bank, I think, just before/during Oct 7th, and ignored reports from the watchtowers (so to speak) that their Gazan locale is about to go to hell in the handbasket.