I just dont think this would change anything major. A downvote/flag is the same thing when considering the impact of it. When money is involved regardless of what you call it, people will take major offense to you downvoting/flagging them. This is the case even more so when you have stake based voting.
If we get 1 account/1 vote id maybe like to see this...
But this doesnt really change much. People arent downvoting enough because its not an even playing field and it cannot be. Not because the flag button is in the top right corner. My personal opinion is that no one should use bots but rather votes should be organic only.... Hell, i dont even think this post should have 600$ attached to it with bots. So what if i went around flagging every one? My account would be dead in days time.
You can make a downvote button, add rainbows to it, make it sparkle..... in the end people wont use it out of fear of retaliation.
Thats a simple fact and theres really nothing we can do about it. This looks more like a change in aesthetic, not much more then that.
If downvotes had a maximum % limit by which 1 account could downvote a post then maybe it could work. But i dont think that is a good idea to implement.