I'd love functional grapple rules, absolutely. I do think throwing willing allies should be feasible, but unless it's a halfling or a gnome you're throwing, you're still not going to get much distance - though it could be used to emulate boosting someone up a steep rise, or over a longer gap tan they could jump alone, etc. The main reason you see other characters throwing each other in PnP is to get a non-flier in range of something evasive or floaty - and in those cases it relies heavily ont he ready action, which we don't have yet in BG3 (we should... along with the proper reaction system underneath that it requires).
Those celebrating the removal of throwing enemies without a check, beware - it has NOT been removed at all. the strength requirement has been increased, but as long as you meet the new requirements you can still hurl the goblins you don't like half a mile away.