I am pretty sure Ady decided to keep the Imperial Walkers' laserblasts red.

I like how he changed the laserblasts of the Ion Cannon to a white/blue. Perhaps he will change the blast of the one Rebel gun, though as we see from the footage, it has no effect on the AT-AT. Unless Ady intends to show it having "some" effect?

Possible solution to the Speeders blasting the supposedly "armor too strong for blasters" falled AT-AT...

Why not have them drop two proton torpedoes onto it?

Explosion is a result of it hitting the sweet spot. Just a suggestion.

Has Ady talked about how he's going to address this?