I agree that SBD is unneccessary and only complicates things for the average Steemit user. A reward in Steem would be totally sufficient, of course in the same value of what we get now as Steem/SP/SBD combined. Then everybody can decide what to do with that Steem, like power up or whatever.
May be SBD has a meaning and purpose inside the Steemit company, I dont know. But the Steemit users can live without it.