You can leave suggestions for Apple here:
Feedback - Photos - Apple
Keep in mind that "moving" might not make so much sense in Photos. Pictures aren't exactly "in" an album. When you "put a picture into an album," its name is added to a list of pictures to display when the album is clicked. It's kind of like a music playlist, but for pictures. So two albums can both have the same picture name in their lists, and that picture will show up when you click either album. But there's only one picture-- it's just on multiple lists. And when you remove a picture from an album, its name remains in the lists of other albums, and the file still remains in your Library.
When I "move" my coffee cup, it's implied that it can't be in two places at once. But that's not true for pictures in Photos-- they're just names on a list.