Deviations?
Strategically, it is a disaster for Hamas and Palestinians, and likely more groups, due to their underestimation of Israel's response. That's assuming this was not the opening act of a larger series of planned events yet to come.
Inflicting terror upon Israeli's did not paralyze them and their response by forcing them to focus on a large amount of hostages and react timidly due to those hostages. It doesn't look like any of the usual suspects thought Israel would immediately declare war and attack with overwhelming force.
The rapid calls already that are attempting to put the brakes on Israel's actions seem to indicate that Hamas is being liquidated rapidly, and their plans to use their civilians, traps and tunnels on their home turf may no longer be a viable option for what's left of Hamas.