I don't believe that the "map" Universal has put out there is supposed to be an accurate park map. It would be like basing an opinion of Typhoon Lagoon/Blizzard Beach based on this map.the majority of the slides won't be themed into anything like a mountain or rock, but on a tower.
Compare this to:
This!
Sorry if my Disney bias is showing, but due to the official universal map i have my doubts with the themeing. It might be a fantastic water park but the theming probably won't be on par with the Disney water parks.