This is a much-needed quality-of-life improvement for the game. Developers really ought to take the time to include galleries themselves, but thankfully we have dedicated modders to pick up that slack. The only improvement I'd love to see is the ability to filter scenes by character, and even better, by tag. Some game galleries do have a character filter, but the tag filter would largely be a new thing. It would just be so nice to be able to see if a scene included say anal without having to remember what the scene looked like from the playthrough.