The DI version (25 years old) claims they model VRS & RBS and cross-coupling, but even at very slow forward speed the helicopter seems pretty stable in pitch and roll.
At high speed it flies like a fixed wing. I haven't tried to hover yet.
I haven't tried any DCS helicopters yet, my yardstick is FSX with HTR, I plan to buy the Huey next time it comes on sale and of course the Hind, but maybe after the bugs have been ironed out.