WIND - I WANT IT!! (...and don't tell me to go eat 3 Pizzas!)
Sorry to be the stereo-typical Englishman, talking about the weather...
Yes, yes, i've been told a million times that many probably wouldn't want it because they would have to work that much harder to fly straight, shoot straight and bomb straight - BUT wouldn't that be more of a challenge - and DEFINATLEY more fun, crosswind landings etc (You would have to implement an active windsock if that were possible.)
Not sure if there is a way of getting the game to mirror real life in the weather's randomness, but in terms of strategy, it would increase game play no end as you would have tailwind missions, headwind, crosswind, letting down into a fog-bound field or diverting, using cloud to conceal oneself, negotiating through heavy rain. Some squads may stay in fair weather and some would prefer to use the challenge of bad weather as a chance that the enemy would not expect them to try a base take in such conditions... If differing weather conditions could be set in one arena at the same time - some parts of the map good, some bad, i really think it would increase massively the enjoyment of game play.
PLEASE, PLEASE, PLEASE give it a go - at the very least, set ONE arena up with it to see how many go on to play, i would think it would be a pleasent surprise.
...i've even placed it as a request with Santa on my Christmas List!!!