I enjoy a long buildup, the different sections could definitely be used in a game to add intensity depending on what's happening, or as you get deeper in this case. And for that, the individual sections may play for as long as needed, and if they set the right mood (I think they do) and adds to the atmosphere to the game, they're doing their job well! But for the sake of listening experience in a released OST, being a little shorter probably wouldn't hurt though, no. :) Also I really like the drums!