You can't see the measures in isolation from each other, they work together.

50/50 on its own doesn't quite get us where we need to be. But in conjunction with free downvotes, poorer quality content will likely take a hit and people will be less profitable with their content indifferent curation practices.

I believe the majority of downvotes will be used with fair intentions of bringing down overvalued posts. There will be some who abuse their downvotes to cause grief onto others, but overall it's a worthwhile price to pay for a real chance at achieving largely honest voting behavior platform wide