Not crazy about the GWC rule, but I don't like races ending under yellow, so I'll take it.
I love the double file restart for lead lap cars.
Racing back to the S/F line when a caution came out always had the potential for disaster.
Also I can remember the leader practically parking his car on the track at times trying to allow a teammate to get a lap back when a caution came out, so I'm ok with freezing the running order when a caution comes out.
I don't like the "lucky dog" rule. If you want to be on the lead lap, don't get lapped.
Don't like the yellow line rule. It took away Jeff Gordon's passing zone coming out of turn 4 at Dega.
One rule I'd like to see is, if a caution comes out with 20 or less laps to go, the race is red flagged until the track is cleared to race.
I came up with that idea watching the final NW race last year when a caution came out with about 13 laps to go, and nascar, with so much on the line in that race, ran almost all of those laps out under caution.