Maintaining command and control in such a battle has to be very hard. Once he went off to ride the dragon (too substantial an asset to not be used), it was in the hands of those at Winterfell and pretty much the Onion Knight up on the walls with various knights leading groups on the ground.
Also, the traditional role of cavalry in such a battle would be very hard. Charging the army of the ice wights in the rear wouldn't have the same effect it would with a normal human force.
I do rather think they'd have been better with hoardings on the walls and more men on the walls rather than outside the walls trying to stand up to the tide. Rotate men off the walls to rest while they play whack a mole with obsidian blades.
That also means that the gate could be blocked with extra beams to try to deal with ice wight giants.
Thinking on it, they really needed to take a page from Kambei.
Every castle needs a hole to let the enemy into in order to kill him.
The should have had a way of letting the ice wights into the court yard to kill them with obsidian. Swinging bars with obsidian or something. Pole arms or what not and ways to pour oil over the walls.
Edited by rmgill, 29 April 2019 - 1618 PM.