not tot forget he said in the past that free 3.party modellers of maps and planes are restricted to smaller maps and a simpler FM !
IF the free stuff is in CoD official standard there would be a chance that 1C would put it in the 'official' ( button "no mods" activated
) part of the game.
and i guess (a very personal guess !!) that 1C want to sell licences of the CoD engine to other AdOn developers , mainly the M$ Flighsim crowd....., and they would have than full acces to the FM and mapsice. but propably still be on the mod side of the game part.
Future will tell.................