Sure, but I dare say Novak could add to this discussion. He probably knows if there is such a tendency in DCS, and he obviously knows much more than we about how he's tuned the MiG high-alt performance, if it behaves as he's set it, etc etc.
I'm not sure how we can proceed by our selves; we've found that there are problems with the cruising ability and service ceiling, but I don't know how we can investigate further.