There's nothing wrong with being picky when it's costing you £9000 a year.
If you don't feel like any of your offers are the right place for you then there is no harm in reapplying to others. The offers you got are from good places, especially Goldsmiths, so I think it's likely you'd get into Edinburgh and Glasgow next year. It's weird how what you're looking for in a university can change so much in a year. When I first applied (before doing a foundation) I got an offer from Edinburgh and I really liked the place, but decided 5 years was too long/expensive. I indented on applying for second year entry this year, but ended up applying to completely different places because my needs had changed.
Edinburgh does offer a degree in Fine Art but it is quite theory heavy. I don't think the courses will be restrictive, particularly not with sculpture, and it might be more useful to have specialised sculpture tutors. The main reason I didn't want a specialised degree was that I would be specialising in painting, and most students on painting degrees tend to be quite traditional and I felt I'd miss out on the variety available in art. It wasn't so much that the course was restrictive, just that it attracted all the same sort of painters. I don't think that would be a problem with sculpture though.
What is it that Edinburgh and Glasgow have that your current offers don't?
You might want to be careful about burning your bridges with the current universities you have offers from, if you might find that next year your not so crazy about Edinburgh and Glasgow either. Although, having said that, you wouldn't really be in a worse off position if you definitely don't want to go to any of them.
Most of me is still pining after Slade, and if everything goes tits-up at Goldsmiths I'll definitely be re-applying, but I figured I'd give Goldsmiths a chance as it's got such a good reputation and I'd really like to be in London. Still not convinced it's the right place for me, but I'm feeling a lot more positive than I was a few weeks ago.
Wow, this ended up being pretty long. Hope it helped a bit.