You're hitting a nerve here. The editor has been lagging behind the actual game engine for quite some time now. As psi29a already pointed out several posts before, OpenMW-CS is the main thing keeping us from releasing OpenMW 1.0.0.
But that's not really the point of the topic: We are talking about playing Morrowind via OpenMW. And apart from minor issues, OpenMW allows players to explore every aspect of the original game and even provides a decent (and increasing) amount of mod support - with the usual caveat of excluding mods which rely on 3rd-party extensions of the original engine.