I got a reply on a separate thread that I made about this issue (before I found yours). He acknowledged seeing this thread as well (although I'm not sure why he didn't say anything on this one), so it looks like we may be getting a fix in the end, hopefully.
I'm still in ME1 but I just started ME2 to check on this and sure enough, it's not the same as when the LE launched as you can see in one of the 4K video on Youtube here, check the 5:06 mark and now my screen caps looks like the ones here. Looks like they increase the contrast and saturation while making the patch.
https://www.nexusmods.com/masseffectlegendaryedition/mods/92?tab=description
Just in case anyone is still looking on this thread, a modder (might be one of you guys for all I know) fixed Mass Effect 2's cutscenes by re-encoding them himself. I left a comment on his post see if he'd be making a fix for 1 and 3, but if he doesn't he did leave steps to how he went about making the fix. I think I'm going to go ahead and fix 1 and 3's cutscenes myself. I'll post links once I do it and can upload them.
EDIT: Here's the fix for Mass Effect 1: https://www.nexusmods.com/masseffectlegendaryedition/mods/94?tab=description
Another user will be uploading the fix for Mass Effect 3; will post link.
