Suppose you had two axes on which to vote (Quality/Agreement) but you only got one vote? If people were forced to pick which axis they speak of, maybe it could

Suppose you had two axes on which to vote (Quality/Agreement) but you only got one vote? If people were forced to pick which axis they speak of, maybe it could allow for more discussion on otherwise controversial topics? I'm imagining a scenario were registering your agreement/disagreement is easy, ala reddit, but saying something about the quality of a post is harder, maybe some threshold of standing in the community, ala hackernews.