Item randomizer and only bosses spawn mode

Well guys, i've been playing the game a several hours now(71 h) and i've got two ideas which would be cool for the game:
The first one is an item randomizer chooser. What it does? Well, it allows to player disallow spawning for items, which have been already opened, in the game. For example, you could check only tier 3 items, and only they will be spawning in the game, but still random. Why do you need this? Imagine you have a run with comando on. Every time you get a box which you need to open and choose an item. The random of items is no longer existing in this case, except random tiers.
The second idea is to make "Only boss spawning mode" like the mode which makes only elites spawn. I think there is no need for explonations..