Lots of great suggestions already here that I won't go and rehash, but one that I feel is really missing would be a HUGE quality-of-life change:
Can we, perhaps, either make it default or an upgrade to where you can take 2-3 photos of Anna in each outfit in one go? I don't even care if I get the rewards for individual pics. I've well since finished the game in terms of the financial challenge, but it just takes SO. LONG. to wait for each morning, select the option, select the outfit, and pick the option that you haven't already. I want to see as much of the delightful art in the game as possible, but the amount of effort it takes just isn't worth the time investment.
Also, I know that a gallery for non-repeatable content is already planned, but can we please just get a gallery in general, of all the photos you've taken, all the scenes you've witnessed? Anna's Starmaker profile is close, but a small, infinite scroll makes for a pretty awkward viewing experience, and obviously doesn't contain any of the other characters' images. Having all unlocked images and scenes available would be a divine improvement, I think most others would agree.
Thanks for all your hard work! Can't wait for the final release.