They stated 30 ships available at launch, pretty clearly sir.
Reference for this please? Good luck, because there isn't one.
What actually happened is we were told there would be 15 ships at launch.
In the Kickstarter there was a stretch goal announced that reads:
New stretch goal announced, if we reach £1.5 million then we'll add another 10 playable ships to the game.
Note this doesn't say at release.
In Newsletter #49 it was announced:
In this week’s newsletter David Braben reflects on the whole development process and how the game has evolved from the original game outline to where we are today – and announces that there will eventually be 30 playable ships in Elite: Dangerous, 5 more than we had previously said!
Neither of these state in any interpretable manner that those 30 ships will be available on release.
People have assumed, projected, paraphrased and misquoted. Through repetition this has become "fact", belief does not equal fact.
On the subject of road maps, this was attempted once. Not for the game development itself, but as a program for the DDF discussion. We were given topics and projected dates when these topics would be released by the Devs for discussion.
It was a shambles, dates were constantly changed, priorities shifted, new topics added, other topics postponed. In the end it was so uninformative in any meaningful way as to be worthless as reference material.
I'm not a developer and have no real knowledge of the process for games (or any other software), so I cannot comment on whether this kind of things is normal. But working as a contracts manager I can say that in my industry - stuff happens, things go pear shaped, resources reallocated, targets altered, advanced or postponed dependent on factors often beyond our control. You do the best you can with what you have.
What you do do though is keep your clients in the loop, so that they know the state of the project. So they in turn can do the same for their customers, and so on down the line. If you are smart, you stay as honest as possible, whilst trying to avoid misinformation and overly optimistic projections. It's always preferable to give slightly pessimistic target estimates and exceed them, than optimistic ones and not. That's just the way it works.
So I agree with Sanderson that FD should try to level with us as much as they can, it's in their own best interests for consumer confidence, but on evidence producing a road map might not be the best way to approach it.