I've heard rumours that Deal were asked to think about the Open by the R&A, rather then putting themselves forward, and that they had an agreement to secure some land from a local farmer for a tented village and had access to a railway siding to improve access to the course. Whilst I think it's a fabulous course, I cannot see how it has space to cope with the crowds. Since then I've also heard rumours they are in trouble financially. I hope that is untrue.
I had also heard other rumours (different source) that not all the members at St George's favoured re-hosting the Open, and that they were quite prepared to sign a blank cheque to make up money brought to the club.
Personally, I would like to see the Open taken to more courses. Although it may seem like blasphemy I'm not a fan of taking it back to TOC so regularly because, as a test, I think I think it falls short of what is required for modern golf. Saunton would be a good choice but infrastructure may be an issue. I'd love see it at Prince's again too (granted the course would need some modification - bunkering mainly), but I doubt it will happen. I don't think the R&A are actively looking for courses