Regarding the spherical flashes, that's exactly how I've interpreted them throughout the films too, Ady, just as "flak" for the lasers. I have to say I am relieved that you improved most of those that lacked the 3-dimensionality and looked a bit dated ;)

I had a chance to view the "flaps test" clip multiple times already with my "critical goggles" on and I think there's one last detail that would look great if added (maybe it's partly because I'm getting spoiled with all of the enhanced details lol). Right here..

Luke's first couple sets of blasts are clearly hitting the snow. May we see impacts with snow getting picked up there? You did it when the Snowspeeders begin shooting at the fallen AT-AT that happens later. That's all that I can see, everything else is perfect!