That's a good point. We all know (or should know) the intention of SBD was to peg to USD to make commerce easier. As an author, I'd rather get a higher value to my posts, so pegging SBD to USD seems like it would hurt me. The only way it wouldn't hurt me is if it helped the value of Steem increase.
If it's not pegged, why even have two currencies? Yeah, I'm sure smarter people than me are trying to look for a solution that helps everybody. Reducing the value of author payouts seems like a really bad idea from my perspective.