Totally for HQ textures.
It only impact local PC so they can't use the usual memory/data excuse.
Just give the option to enable it and that's it.

Ekk, I wouldn't mind if they do it gratually, just provide textures a bit less compressed than the one we have, it will alreaby be a great step to make better close-up screenshots!

It might be a wrong impression that I have, but I can't imagine that they're creating the textures as we see them but just compress them at the end for optimization purpose.
I don't think it would be that much of an extra work to be able to provide better quality.