The only thing about this that doesn't sit with me is that if Webber doesn't want to retire, why wouldn't Red Bull keep him? I don't think any other top line driver will be on the market (unless Hamilton jumps ship, which is looking less likely), and neither Riciardo or Vergne have set the world alight yet. For Webber to leave Red Bull but not be retiring would mean Red Bull have their sights on someone better, and I just can't see who that might be?
I can see why Ferrari might wan't Webber though. He is solid, if not spectacular. I can't see him being that happy to take on a 2nd driver role though, unless he just see's it as a retirement year.