You're making it sound like it's a bad thing. If I'm not mistaken, Rowling made Alfonso and the crew a quick drawing of the map, showing where's what in her world, that she did in just a few minutes, so I think the layout in the movie is, as they say, just right and makes perfect sense, unlike the first two. If you ask me, the Whomping Willow being that near to the school in the second movie doesn't make a lot of sense to me, as it was where Lupin had to go to get to where he could isolate himself from other people due to his werewolf persona. Surely help would've arrived sooner for Snape when he was tricked into going inside the tree and almost getting killed by a fully grown werewolf if the tree was instead stationed just barely outside of the school rather than where it is in the books, like far, far away from the school in an isolated area where students don't frequent?