I am, at least according to Dirt, an optimist. I like racing online. Sometimes, you guys aren't on, and I want to race without leaderboard cars. A B-class room turns into Team Mugen pretty fast. I want to start putting together a list of restrictions that can open up each class for good competition without the leaderboard cars. Here are a few of my ideas. Pick them apart, debate them, etc.
D after 1990 (or 1995, or whatever the most recent limit date is. This removes the Golf, Chevelle, and Charger, while still leaving all three regions and lots of good cars open. I hate that it cuts out so many of the older, smaller foreign roadsters, though.)
D from Asia only (this, again, removes the Golf, Chevelle and Charger. It also cuts out the Pugeot, the other potential LB car. It includes several small roadster options though, such as the Mazda roadster, Fairlady Z, and 2000GT. It eliminates the Elan and 914/6, though. This is a little better than the 1990 option as it includes a better mix of FWD and RWD cars.)
C Front engine only. This cuts out the 5Turbo and Elise, which are both MR. It doesn't count out the missiles, though. It also cuts out a couple of old Porsches.
B North America, modern only (1990-present, or whatever). With the Pug and Mugen so dominant, this seems like the best option. Getting rid of the older cars gets rid of the missiles, but it also gets rid of the coolest cars in the game. The problem seems to be that hp caps must be set in 100-hp increments. You can't run 200-450hp, for example, which would solve this problem. With this group, I'd be more than happy to leave it open to all North American cars. Even with the age restriction, though, there's a nice mix of stuff; There are a few mustangs, a camaro, the sockmonkeys, etc. It's not ideal, but it's playable.