Downvotes are already a questionable design choice, which encourage passive-aggressive drive-by behaviour rather than engaging with and countering challenging ideas. They're kind of a dark feature, which give the user a sense of participation, or worse, the sense of being a cop, while contributing nothing.
They are catharsis without praxis, and they almost certainly contribute to online toxicity.
Actually giving them forum or site moderation power is... Well, it sure is doubling down on that feeling like a cop thing.
And what are all cops?
The polls are all starting to show the Liberals gaining on the Conservatives, they're just showing the trend starting at different times. Ipsos, Nanos, and the others are even showing the rate of change being similar to the EKOS polls (the most recent of which have the Libs and Cons in a statistical tie), just starting several weeks later.
There's enough runway to make this interesring, and enough Trump to keep the trends going.