Personaly i would like if caching a potion would cost reaction
Interesting idea, but the key here is "catching", which should be different from "consuming" / "drinking". Even in BG3, the latter still costs BA, and BA is unavailable out of turn (should be?..).
Otherwise, if 10 Duergars will decide to heal one of them together, sure it will take them all their turns in a round, but the recipient will effectively become unkillable for that time.
Well, actually, if throwing a potion to an ally then required the ally to expend their reaction to catch-and-drink it, otherwise the potion is lost with no effect, that would be workable - after all, you only have one reaction per round, so no matter how many allies a target has, it could only benefit from that once per round, and at the cost of not having their reaction for anything else. It would also mean that throwing potions on downed players from across the field would no longer work (can't use a reaction when you're downed), which I'd be happy about.
But, catch 22, this would, once again ,require a properly functional reaction system in the game, which we do not really have right now.
