I don't wholly agree with this.
First and foremost I want my collection software to be accurate. And classifying to be also accurate.
The problem with your suggestion, is that when I number my boxes, for exemple I have the "Van Helsing" ultimate edition wich comes with Dracula, the wolfman and frankenstein, on 1 single additional disc, if as you suggest I listed each movie I would then have 3 additional numbers and nowhere to put them. I print out number labels (much like a library) and stick them on my dvd's. When someone borrows the 1 disc, i would have to search for 3 different movies to list as loaned... not very practical.
There should be a way to check a box for box set, then once that box is checked you can have a empty field where to add the names of the additional movies that come with the box set.
In addition there should be a way to add a movie, and select wether or not you want it "counted" numbered... the in / not in collection does not offer this possibility to my knowledge items are still counted (indexed) wether or not they are in collection which gives you a false count of your collection.
I know you only add / modify features when it will benefit the majority, but I also believe the majority most likely does not read the forum, and thus we never really hear their opinions, they just use what is presented to them. However those on the forum, are the hardcore collectors and really the ones your product helps, they use it, offer their own modification (those that have the knowledge) help others graps it etc....
The point of a collecting software is not only to "catalog" what you own, but to do it as accurately as possible, for real collectorz anyhow, I would not list my First Edition books, under paperback for instance just for convenience sake. (speaking of book collectorz how about a check box for signed copies?)
Anyways I keep awaiting changes and welcome each one that brings collertorz software closer to what I wish for and I'm sure someday all my little wishes will finally get done

. Not being a programmer I can't do modification myself but from reading here I know it's also not simple so I can be patient.
Happy holidays to all