From what I've heard, people refused to include it in an official patch. It does not fulfill the quality standard of DT, which isn't measured in beauty, which this plane certainly is, but in polycount, wether it is compatible with computers that fulfill the system requirements of Il-2 1946, if it is done like all other official Il-2 aircraft etc etc. the list is long.
Back in the AAA days I read that they said it would be easier to start this thing again from scratch, than to convert it to patch standard... :/