Pretty easy to do though, outside of the last mission. And as it turns out, Ghost isn't game-wide, which I hadn't realized until now...
The game is gorgeous, level design is tight [insert vent crawling joke] and full of options and hidden goodies, as usual, but on the whole it felt incomplete. I didn't tally the numbers, but it seems smaller than the first game. It didn't strictly need a 2nd HUB (or a 3rd, as was planned for Human Revolution), but it sure felt like Golem City was meant to be one at some point. Missed opportunity, given that it's the grimiest, cyber-punkiest area of the game. Plot wise: So many questions (and a mid-credits twist on top), so few answers. Sure feels like a middle chapter.
Also, the incredibly long credits made my GPU fans spin faster than the game ever did. Wtf kind of codec did they use?