Considering that all cloud implementations in games or even dedicated tech demos are a far cry from that video, and that no other flight sim has a cloud rendering system that is really superior in all relevant areas to what has been shown so far for CoD, this looks like a severe case of unrealistic expectations to me. Sure Oleg raised those himself back when speaking about his plans, but if people seriously expected that this could lead to anything approaching the complexity of real-life clouds then that's a delusion. It's simply not possible, both for technical and financial reasons. You might as well post real footage of planes, landscapes, explosion/smoke effects or pilot animations, and complain that CoD doesn't look like that.
As with many other aspects of CoD you should consider that this is as good as it gets at the moment; not because the developers don't know any better or don't care, but because they can't do any better. And yes I have a list of stuff I'd have done different to what's been shown myself, but certainly in a different league than this complaint.
Oh and the FSX clouds sure would suck for a combat sim