Well take all the other item packs out there, most of me are connected with each other except for other additional items. Like if I were to get Theirrys item pack, I would still be able to see Delays and Ringos.
Idk I just think in general a sync of items would be good here in the long run. Just like with the preset sync, I'm sure a item sync would cut down on all the items packs out there