I wasn't a fan at first but then I realised it's just a tool that opens up more possibilities for mission designers. I'd hate to fly against one but it would be great to fly a deep strike 4 ship.
The point is, it's happening now so embrace it. Try to gather as much information as you can and help to make it as realistic as possible.
There are avionics demo's and lots of first hand accounts of how it flies and many other variables can be closely calculated from the information we have available, such as weight, thrust, internal fuel load, Max G load, wing area etc.
It won't be DCS A-10C realistic, but neither are FC3 aircraft. Just accept it for what it is.