CheezeDip, I don't know who you are, seeing you havn't signed your posts, so I'm inclined to think you post are a troll, on the other hand...
The "fog" you speak of,was put in to ease FR in the game. With a distance fog added in machines don't have to draw all those details hidden by the fog. When the fog was first put in, it was a bit much, however after a trial period it was toned down. Enough so that most don't even see it any more... see Krusty's post above.
The early war arenas and the mid war arenas were made to have arenas where people could fly with always having to worry about the "late war" muscle machines thundering in. Early war has those planes that were avalible then, with a couple that were "new" at that time period of the war hence the "perked" rides. The same in the Mid war arena.
The late war arena was split due to the "health of the community" there was too much hording, and not enough fighting, and HTC retention of clients was getting effected. The arena was split, and an automaticlly adjusting cap system applied to try and keep the population in both arenas more even as the climbed and dropped in cap totals.
All of this info is easily avalible by runing a search on these boards. Yes the game has changed from the old days, but some things are better, some maybe not, but where are ya going to find a flight sim thats even half as much fun?? No where !
So, join the fun, or don't, its your choice !