Big Easy: Fangraphs already has stats for framing, and incorporates them into their WAR calculations. See here:
https://blogs.fangraphs.com/war-update-catcher-framing/
https://blogs.fangraphs.com/fangraphs-pitch-framing/
So I'm sure it can be incorporated into OOTP. All it would be is adding a quantifying stat to something that is already happening in the game. It doesn't matter that there's no pitch locations, there's still the affected K/BB rates. I'm envisioning a line occurring in the play-by-play for a called strikeout affected by a defensive catcher: "The catcher really had soft hands there!"
Anyway I'd think that properly assigning value/WAR to the right players is something we can all get behind.
EDIT: From Matt Arnold's above comment perhaps it isn't as simple as I'm thinking. I suspect Catcher Ability is thrown into the blender for a plate appearance outcome, and isn't necessarily the reason for any given strikeout or walk. It could push it over the top in some dice rolls I suppose, but that might be hard to record as a stat.