I think that would be handy especially if each person has two or three pairs of shoes. That's my complaint about many DVC closets that there isn't enough floor space for shoes because the pack 'n play, high chair and sometimes a safe takes up most of the space.
And it would work for all of those toiletry items for the bathroom. Although with the modification of the studio we often left things in our toiletry kits and just placed them under the sink where there was a fair amount of storage there. Then we just brought them out as needed.
I'm not sure it would work on the sliding bathroom door. It might interfere with the doors movement. Perhaps if you had large suction cups you could place it on a wall.
Thanks for the suggestion.