Just finished it. I also had an issue with spotting all the action but this is the moment when you make yourself a better pilot. Every mission of each campaign I didn't pass at first, I learned something new.
E.g. in this mission I tried to correct the GBU strike point by the little and I missed so decided to do it again. But when you think about it why should you correct pre-planned strike in real life? Also taking account the impact angle of JDAM and the position from the aircraft, if you want to hit a building that high at 60 degrees you need to point behind him.