Certainly the worth of the vote should be de-copuled from Steem price in USD. In fact, the Steem price in USD shouldn't influence anything or be noticed at all on Steemit outside the wallet in my opinion. Now that the wallet has been spilt from the main steemit-page, focus on the main page should be on the community and the steem blockchain and token, not the dollar value.
RE: The investment algorithm should be changed, not rewarding system !