The entire suit is actually very light, being composed primarily of aerogel titanium reinforced at a molecular level with an energized integrity field. This make it light enough to glide, but strong enough to break through a brick wall.
Underwater missions are not my idea of fun. I've only experienced Warcrafts Vashj'ir as far as I can remember though. That zone was made quite beautiful but most people avoided it because of how 3d fighting worked iirc.
No joke, take the Demotruck loadout in TF2 for instance. when you hit somebody with it, their corpse goes flying. (the Demotruck loadout requires that you go demoknight with the splendid screen and ether the Persian Persuader or the pre-changed Caiheamh Mor)