I mean, that’s basically how it is now - everyone in the pug effectively rolls “Need” and the system throws them an item they can use…
… and then people who want the item try to beg you for it.
You’ll be able to do the same thing in Group Loot - though there’s a chance people who don’t want your item will actually greed it instead and they may even give it to you even if it’s an ilvl upgrade for them (like 3 ilvls vs. 20 for you).