I think the steemdollar over Steem is only temporary. The problem is only Steem was added to Binance. That kept the price of Steem up during the market drop. If the market would have been stable, a listing on Binance would cause an surge in price. The fact that Steem is higher than SBD is artificial. Eventually demand for SBD should drive prices up. If SBD gets listed on Bianance, then expect a surge.