I'm sure no expert, but I have to say, I'm very disappointed in the flight model for some of the a/c, most particularly the Albatros series. It flies like a moving van. (My very first piece of software I bought for a PC was a combat flight sim, in January of '94, and that's been my favorite gaming activity on computers ever since. ) The AI, as some of you have mentioned, leaves a great deal to be desired, especially in the Beta career mode, I've heard the Pat Wilson Campaign Generator has improved that somewhat.
When you look at it, it's a terribly, terribly expensive sim, I won't even look at what I've spent on RoF. Personally, I don't like that, but it's the only game in town if you want a WWI flight sim experience aside from OFF which I can't get to run on my PC since my latest upgrade back in 2011.
Warren