With the exception of a few mega rich members, the PL is not an elite club. IMO more than half the clubs struggle to stay up. With some wise spending and a bit of luck all three stand a chance of surviving.
QPR yes in my view. Norwich and Swansea must be favourites to go straight back down again. Wigan will struggle again as well.
QPR should be o.k. as long as they spend big on new decent signings. There also appears to be a power struggle going on in their boardroom. I think Norwich and Swansea will have to work really hard to avoid the drop, but the best of luck to them.