Wow, lots of overreactions here. The walk from Westwood to main campus is absolutely nothing. It's probably about 15-20 mins to the end of campus where the union building is, but it's really not a problem. Also, you'll have a much shorter walk to Tesco than everyone else.
Furthermore, Westwood is not 'dead'. It's certainly a lot more lively than some of the other halls, e.g. Lakeside, Heronbank et. al. Besides, 'how busy/interesting' your halls are is much more to do with which block you happen to be in. Some just happen to be more, um, raucous than others.
I was allocated temporary shared accomodation last year and it was fine. In the end my roommate never turned up anyway and I stayed in Westwood. Looking back, I wouldn't have swapped it for another hall.