I understand people are unhappy, and I agree FD have been a bit terse and rigid in their communication regarding offline. I also agree they should have offered a proper apology directly.
However, the life of a developer is not that easy. It is impossible to keep everyone happy and it is extremely hard to deliver more complex projects without sometimes sacrificing features. And yes, they are sometimes features that you may have said you would deliver.
As a developer, I am personally wary of Kickstarter and to some extent even Steam Early Access for the very reason exhibited in this forum: People do obviously want to back developers directly and they do want access to the product before it is ready. However, in doing so there is little leeway given to the developer and little respect given to the fact that game development is a complex process and a project is often a moving target.
Kickstarter backers pledged money to FD to remake Elite according to their vision. It is mostly the same as investing in a company; you trust your money with a third party in the hopes that they will deliver according to your expectations. Sometimes they do, sometimes they do not. In neither case do you really have grounds for a refund. You have a right to be disappointed, sure, but not much more than that.
Pledging on Kickstarter, or buying in in early access or beta/alpha access is a risk. Life for everyone would be much easier if this was considered more in this discussion. All parties took a risk (yes, FD too). It mostly panned out, but not to the satisfaction of all backers. That is simply the nature of commercial software development.
So, please, do give FD the benefit of a doubt. I do not believe they are the bad guys some here paint them to be.