I don't know if it is by design, because they are super busy, because they don't want the legal ramifications of promising things that aren't 100% going to be delivered, or what - but there isn't really a centralized road-map. There are bits and pieces of what Dan/Ned/Steemit's plans are scattered everywhere though. (Almost in a decentralized fashion...) One example is the recent hackathon interview. There are lots of other posts/interviews that give previews of what is in the works too.

As far as the price, it is going to be at the whims of short-term traders trying to manipulate the market, the whales cashing out, and the downward pressure of authors cashing out for a while. In the short-term this is bad for Steem/Steemit, but in the long-term it is probably good. The centralization of power is one of the bigger issues that the community has, and if the price gets low enough - whoever wants to can make themselves a whale, can.

For those that believe Steem/Steemit is going to succeed once more features are added, the kinks are worked out, and more tools/platforms are built on top of the block-chain, then the future is looking bright. Eventually once Steemit is turned into a professional site and there are more incentives for people to buy/hold SP, then the supply and demand equation will be different.