hey i got put in ransom pickard in my fresh year and yes i was totally gutted too when i got the letter. However that said my room-mate was and still is an absolutely amazing guy, im living with him this year. Ransom pickard itself looks an absolute sh** hole, its pretty basic, but the people in there are probably the best in the uni. Everyone that was in my group of friends in Randy P that shared a room are either living with their roommates or are still really close friends. I wouldnt worry too much about the catering side of things, Lopes hall food is arguable the best in the uni and a couple of my mates who are veggies had no problems.
If u really don;t want to share a room you can call the accomodation office, the earlier the better and they may be be able to sort you out, if not it really isnt the end of the world, i wouldnt have wanted to be in any other halls.
ps randy p is in the best location, 15mins from uni and 10 mins from town, really is the best halls the uni has to offer (although it may not look it at first sight!)