The bottom line is that it IS Ady's edit. All anyone can do is argue their point logically or illogically. There are plenty of extreme close-ups of the TIEs in action throughout ANH (specifically during the Falcon escape battle) and not once do they even remotely appear bluish in any way, shape or form. To do it for EMPIRE is one thing, as that is how they originally appeared. Considering that even Lucas has never blued the TIEs in any incarnation of ANH should say something.
not blue
In the end, this will probably be a good thing, being that it will give me one more reason to learn After Effects and other programs so I can re-color correct the TIEs to grey.