The more I think about it the less I think it will be the WAAS version of the 430. To me that's ok because I think that would be beyond the scope of what the 430 is being implemented to do, whitch I believe is to help some of the Russian and older aircraft navigate using Gps if they wish to do so. Since as of now DCS is missing many smaller airports and a few navaids I wouldn't expect a full jepp database either.
ED can basically just add all the GPS fix points (just imaginary points in space), the nearest airport function, DIRECT function, TERRAIN function. The ability to manually add gps fixes and coordinates and Maybe even the flight plan and OBS functions and that would be sufficient for a combat flight sim IMHO. I don't think it has a reason to be FSx payware quality.