I agree it would be cool if they patched in smaller versions of the large objects, but I do think there is enough of them to warrant a stuff pack with some additions to what has already been mentioned. For instance;
1. End and Coffee tables - IMO we need a variety of smaller ones. The ones in the game seem huge to me and take up so much space. If you shrink them, then objects you try to put on them float in the air unless you fiddle around with MOO to get them to sit correctly.
2. Showers - I'd love just a showerhead, hot/cold knobs and glass doors or shower curtains as separate objects. That way we could design our own and save space.
3. Appliances - Counter stove tops/grills (like a Jenn-Air), table top hibachi grills that would sit on the end of a picnic table, built in wall ovens, and under counter microwaves/coffee makers. All of these would save space too.
4. Stuffed Toys, like Blarfy - A smaller version of these that toddlers/children could carry/hug/talk to would be great.
5. Dressers - I think we only have a couple one tile dressers right now, all the others are at least two. I know we can shrink some of them, but sometimes they just look odd when you do that. Most dressers are too deep? (if that makes sense) We need slimmer ones that don't stick out from the wall so far. I'd love some smaller versions of the closets too as far as depth goes. There's one lovely, slim 'closet' that registers as a dresser that's two tiles and has one door open showing a backpack/clothes. I'd love a one tile closet like that with one door partially open. It wouldn't need the 'regular' closet animations, just act as a dresser.
6. Hall tables - We have some slim ones, but most are too deep again, like the dressers.
7. Computer desks - I love the one tile desk with the bookcase above and the two writing tables for children/teens, but I'd like more variety of these smaller types of desks and perhaps make their depth smaller.
8. Clutter objects - More small objects that would fit on shelves and an update to the ones we have that WOULD fit but don't for some reason unless you use MOO to put them there.
9. Hot tubs - Smaller two person versions like we had in The Sims Vacation. They looked like a big barrel, so kind of rustic, but could give us a more modern version too. Built in hot tubs would be fantastic too of these smaller versions (big ones too though).
Perhaps it would be better to call this a 'Space Savers' SP instead. lol These are just a few things I could think of off the top of my head, but I'm sure there's more.
Happy Simming! <3
EDIT to Add: I think ladders and spiral staircases would fit nicely into a Space Savers SP too!