Check out anything on Steam Early access and you will see that your statement is wrong. Other games do not release a game over the course of multiple years. So they only need to communicate any large changes/adjustments and new content. DLC is not core content its DLC. Both Star Citizen and ED have decided that is the route they are taking.Um, no it isn't. Why do FD need to tell us in detail what they are doing? The only reason RSI does it is to calm people down about how they're spending their money... I haven't ever seen another game company do this. FD have released a game - either buy it or don't, enjoy it or don't, but don't think you have any rights to anything beyond that.
However early access projects such as ED should be updating as they go along. That is both the curse and the blessing of releasing a product gradually. You can have time to make things perfect, however people do expect to see progress. Early access games are literally one step above beta in its completion. However its is not yet a complete product. As it stands we have to wait until E3 to find out if and when we will see bug fixes. We have to wait until PAX to find out if day one promised content will be added. That is no way to support your ongoing project.
Everyone who has purchased this game and are playing the game have invested both time an money to its creation. PR or Dev team, I dont care which, can abate the vast majority of the negativism if they would only communicate progress or changes. If this was supposed to be a huge surprise and the community is to have no input on the design/direction of the game, then it should not have been released yet. If they had not done it this way, then the cool stuff the community pursued would not have been added. See Colonia and the addition of PG owned mega ships as examples.
Either way I am not justifying myself to your views. Take it as you will, however I know what I need in order to have my fears/negativity addressed and I am not the only person that feels that way.