Well I have finished my suggestions now but I would like to say I do not support the adding colored muzzle flash to the storm troopers... The main reason being
If Ady and the team are going to dress people in any outfits which will be difficult enough it's yet another thing that will have to be done on top of everything else and to also alter it on existing footage across 6 films.
I can not imagine that I would be staring at the screen saying to myself "wow, when the storm troopers fire they change color slightly" A lot of work for very little pay off and I would suggest that the PT should be changed so that no color reflections are present on any cgi troopers that are kept in the edit.
It really has no wow factor about it.