While I certainly see the merit of a system like that I think it would be challenging for new witnesses to make any headway into the top 50. There are some exceptions but I think it might end up causing less people to try and make a witness with it being that challenging. I could be wrong for sure but it would be best if they do end up implementing the witness decay vote that blocktrades is toying around with getting to work. After a year I think it is, a witness vote goes away and you have to redo it. Don't know how it will all work but that's the best scenario I think. Then I think more people will delegate to someone who is actively on top of that, to vote in a witness proxy trail.