The fact they state the aircraft may change, mean that most likely not that much is done.
I don't see a small studio such as ED developping an aircraft, then just abandoning the work (and money) done in it.
This update was a huge let down for me. I was hoping for information on the next jet. Now it seems we are years (2-3?) away from anything.
The fact that they haven't even decided which jet they will use makes me believe there might not even be another jet, which is why they are working on so many other projects.
There is a lot of work to do before they can even start on the stuff people consider to be "working on the next jet". The problem is, when you (and many others) think "working on the next jet", I suspect you think of things like 3d models and the avionics stuff you see in the cockpit such as MFD screens etc.
The reality however is that there is a LOT of stuff to do before that point is reached. Things like RADAR for example, the sim engine has to be updated to allow for such things, and a RADAR model created before a specific aircraft's RADAR system can be modelled. The same goes for flight model stuff like transonic/supersonic flight, as well as many, many, many other things.
That is the kind of stuff going on in the background, once all that stuff is done work can then start on the specifics of an individual aircraft (i.e. the things many people think of when imagining the modelling of a new aircraft).
As for the aircraft may change, well yeah, I'm not sure why people have such an issue with that statement. Have you forgotten than to start with we were going to be getting DCS:A-10A? It was only during development that circumstances changed and allowed the switch to the A-10C. Exactly the same sort of thing could happen this early in the development process, and it in no way means that all the work already done would be thrown away.
As for the current projects getting in the way of fast mover? I'd remind you that if ED were to go out of business due to lack of cash there would never be a fast mover, no matter how many people had been working on it. It's far better for ED to work on and release other products to keep the cash flowing, and therefore have the ability to hire additional staff and make smaller changes to the DCS world that will end up making DCS:Fast Mover a better sim when it does come. Don't you think?
Remember the big picture.