So I think I have played through about 12 or 13 times now and I think I might have gotten every ending. One thing I really hate, spoiler alert if you haven't fully played through.
You can't go wedding dress shopping with Bella if you are on any harem route. She still wears the same dress no matter what, but the wedding dress scene was a very nice touch to the wedding day and I feel it should be in every route possible with the soft version of Bella.
Also, either I missed these routes or there are not routes for it, but do you ever get to take Liza, Rachel, or Susan wedding dress shopping? If not that should completely be a thing too.