I had no problem with Veteran. I was quite dissapointed with it. Loved the story and the set pieces, just wished it was a little harder. On the other games there were parts I was stuck for days and had to fight tooth and nail for every foot of ground and
I had a real sense of achievment when I finished them. I dont claim to be the best player, I am just average but this whole campaign took less than a couple of days and left me wanting more.
The hardest mission is signing into CoD Elite for me at the minute. But have to say the campaign was very easy. I too miss the days of being stuck on the same checkpoint for ages. The days when CoD achievements were an achievement.