Once the SPS is in production you can propose whatever changes you like to the Steem stakeholders who can then fund the development of those features. Until then, we have to use our judgement, and the communications we have with the Witnesses, to guide the code we develop. If you don't feel we are making the right decisions, then that's a perfectly good reason to support the SPS. Until there is a decentralized mechanism for funding Steem blockchain development, you're stuck with us :)