In fact it is the guys responsible for the Ground AI in DCS that are the driving force behind this. I don't think there is any intention to best SB Pro PE - not yet anyway.
BTW ever since Flanker 1 the ultimate goal of Eagle Dynamics was a Digital Battlefield - This is a (Large) step in realising that goal.
I understand your desire for DCS:-US Fixed Wing, I do. You must realise the time and effort required for such a project. Time and effort costs money. Money needs to raised somehow to fund major projects.
It would be so easy to drop sims and develop FPSs if money was the main goal, thankfully it isn't. But it is necessary to stay afloat.
Titles such as CA, FC3 and Mustang are what will eventually get you DCS:-US Fixed Wing. If they did not exist nor would DCS:-US Fixed Wing, nor likely ED for that matter.
As for your questions about CA - you'll have the opportunity to find out for yourself sometime this month.