I don't think there will be any impact at all. It's 2 different game modes. I also can't see any players swapping over to deadman mode at all. In my opinion, it's completely unplayable for casual players. Nearly all progress is lost on death. It's like a private server honestly.
If you can't rank up, you deserve to be there. That's as simple as it is. If you've been playing since 2009 and you're still silver, imo you should be looking for a new game to play.