I think the game has some flaws but its also lots of fun to play (when it works). I think compared to BO2 Chost has more lines of sight to get killed at snipped from, take for example Bayview you can get killed from 3 different locations in this map, while previous COD titles (once again using BO2) was more of a straight line shooting sights.
Some maps do bread a tonne of campers, but unfortunately that is the game, some people camp some don't I hate camping, I tend to rush, but also I have been owned by some campers on some games, I guess its all about picking your battles if you know a camper is in the corner and his taking out half the team, then don't head down that way.