I thought the controls svcked, especially the horse. Rockstar have never been very good at making smooth, fluid controls.
This is what Rockstar said about the game being on 3 discs on 360:
L.A. Noire was always going to be a massive game, from the size and detail of the world to the length of the cases, and of course, the sheer amount of MotionScan data required for the faces of over 400 actors in-game," he explained.
"To tell the story and make the game we wanted to make, we knew that it was going to take an entire single layer Blu-ray disc and three Xbox discs."
As a reference point, Rockstar's last effort, Red Dead Redemption, shipped on a single Xbox 360 disc.