Regarding stacking same item on the same unit/champion.

Something that would be refreshing to see is to limit one type of item on one unit/champion. So you can't triple locket stack or triple stack the same item.

We'll see a greater variety of items across the board and it'll be easier to balance. Granted, with locket you could spread the lockets across three different units/champions but at the very least it would prevent them being all on the same unit/champion