Reero- Moderators (or maybe both captains if they agree) should be able to abort a draft in the middle or at the end. I can see a lot of situations where someone misclicks or the like.
I didn't have time to stick around and watch the pugs last night so this could already be a thing, but I feel like a "Confirm pick of [NAME] as [ROLE]"-popup would help the misclick issue, at least.