I love weather, it adds a lot of mood. And to inform Michael, that not all battles were fought in bright sunlight. Sorry about your autopilot lancing gets thrown off, but weather, night and fog, actually introduces an interesting perspective, and forces people to play different, changes the maps. Not everyone wants to do the same shit again and again in pure daylight.
I agree that there shouldn't be too much night as in 50% of the time, but sometimes.. yes. Perhaps 10-20% of the time should be night, rest dusk, day and dawn. Fog is a very nice element too.
And it's not true that DX7 removes fog in itself. Depends on the settings you have..