Well, this should be obvious, but it sadly isn't...
I think the system we have now works well for the thing it's designed to improve.
Either way, after the divisive last few years I don't think that that many people care for downvotes anymore, i.e. for what "the other side" thinks.
Slightly related to the topic of moderation and this forum, the people behind it should really do something about allowing users in here to delete their comments/past history. We’re only a doxxing event away from making the news (this forum was no better than Reddit when it came to the Boston bombing, as an example and talking about doxxing).
Downvoting for disagreement was absolutely a norm here 2010-2012. You'd have been chided for giving a reason to your downvote then.
The deletion of comments and comment history is a perennial topic; you can search Dan's comment history to understand the rationale behind our policies on it.