I also am not enthusiatic about these suggestions.  I play the game to pretend that I'm a fighter pilot, not to look at scenery (I can go outside to do that).  I even dislike dawn/dusk.  Initially it is pretty, but this wears off after a few sessions.  Then all that's left is the inability to see anything, and I log off.
  Instead, I would like HTC to concentrate on producing more planes.  More realistic flight models are also appreciated, to the extent that they allow interesting dissimilar-type dogfights.