As someone who did his MSc in Aber, I can point out that funding situation and facilities aren't as bad as you might think. First, they have the E. H. Carr scholarships that you can apply for. I also believe they have smaller grants. Second, they recently built a separate building for International Politics so I am sure they have adequate facilities for their students. Advising might be different, but like all other places, partial responsibility falls on the student as well. My adviser was superb and we had a great working relationship. I don't know about faculty leaving, and it is also understandable considering that Aber is in a remote place, but they do have the prestige and resources to bring in new faculty as well. I have to admit though, Aber is probably better known for its focus on critical and post-modern approaches. As evident from their MSc degree schemes, I don't think their primary focus is on mainstream constructivism as in the US. Thus, I think you should be aware of that. If you have any further questions about Aber please PM me.