I'm not sure were people find the time to play unofficial mods. There's so much content with the original IL-2 Sturmovik 1946 alone, have you played through each campaign already?
Edit: On top of that, you never know which version a mod uses, it's almost always an earlier version that doesn't work correctly with the latest patch.
IL-2:1946 is out since 2006, and I'm just talking about 1946. There is two campaigns from the first Il-2 Sturmovik (2001), a lot of campaigns from Il-2 Forgotten Battles (2003) some from Ace Expension Pack (2004) and all the pacific campaigns from Pacific Fighters (2004). So yeah, in 17 years, I've played all the official campaigns of Il-2 1946, and I don't think I'm the only one.
Il-2 has a great community that allows me to still play this game on campaigns I still not know. Thanks to all the modders.