Yeah, the combat is impressive but how quickly would the novelty wear off? And more importanly, how good would the overall game be?
And as for real-time dynamic weather, didn't MS Flight have that? Maybe Ship Simulator Extreme too? And I'm sure I've seen some weather related mods for Skyrim. I'll be starting a new playthough at Xmas when I pick up the DLC for the Steam Xmas sale so hopefully I can find some then.