First, of course i think wacken is a great festival. thats why i return every year. And i think its great how the festival has evolved from where it started. Well, I dont like metallica that much either but at least one of the headliners should be a band that alone could sell 40000 tickets in a single show. As for the inhabitants of wacken they have drunk metal heads and pounding music the whole week so a halve day more of music from the stages wouldnt do much harm.
Personally i liked 2005`s line up best but it has been many bands to my liking every year. So a halve a day more would mean more great wacken atmosphere, nice people and great music...