So, quick update on my situation.
My 55B7V exhibited some banding and strange mottling in the darker grays; I contacted LG and they were on the brink of doing a panel replacement "surgery".
Alas, Black Friday rolled along and I got a *huge* discount on a 65B7V. I bit the bullet, sold the 55, and got the 65 yesterday. It's a 711 (ah!) build.
There's *no* tinting that I can pick up on - going as far as going over photos in image editing software and doing any and all picture manipulations to bring out/exaggerate any issues.
There's some vertical banding at 0 hours, but nothing too serious from what I've seen here, and a bit of vignetting in both lower corners. Then banding hasn't shown up in actual content yet, the vignetting I'm not sure (some content/scenes have vignetting in the video already, so...), have been watching in ISF Dark the whole time. All in all, in this respect, I consider it a better pick than my previous 55 inch.
So maybe I won a middle prize in the "panel lottery"! It's not pristine, but seems fit for purpose.
Lastly: I won't be taking or posting pictures of the set. Going with the mindset that if I'm looking for problems, I'll find them; and if I have more eyes and brains trying to pick a display apart, all the more worry and stress. I'll happily opt out of that!
B&W 68X Theatre
BKElec XLS200-DF Sub
Dali Alteco C-1 Atmos