The problem is that the network is designed to keep a 50/50 payout of locked vested shares to liquid token. Right now this ratio is actually more 1/8 because of the loss on the peg. This further exasperates the problem that is so rampant on steem already, which is the trend towards short term gains rather than long term value in the platform. the 50/50 payout is the mechanism which is to add balance here and now it is broken. Long term keeping SBD floating means a lower steem price on technical terms. Maybe the extra incentive to posters is really what the network needs in order to grow, which is the argument to keeping SBD.
If you believe in this 50/50 balance however, It makes no sense to have two free floating tokens for the network. You might as well just give out 50% vested steem and 50% liquid steem in that case, which would actually help bring up the price of steem. If it were valued as one token STEEM, or two with the PEG enabled, then the value of the payout would be more proportionally locked up to the designed 50/50.
My question is, who is buying all this SBD to keep the price up, and why?