We were there today and the Sky Rider track is completely gone now. I did find the sign outside the entrance that said 'this ride is currently unavailable' quite morbidly funny, somewhat akin to reading a gravestone that says 'Mark is a bit poorly today and won't be coming into work'. Of course it's currently unavailable, it literally doesn't exist anymore!
Personally I won't miss it too much, purely because we seemed to be unlucky in that it seemed to be always closed when we were there, but the views were nice and I understand why many will miss it.
Nice few hours in the park overall, although my only major complaint is that Flight of the Sky Lion loading times seem to be getting even longer - I can empathise though as getting certain GP (especially with young kids) on a flying circus while complying with all safety regulations must be tricky. We had a nice time looking for the LEGO Elves scattered around the park. Personally as a nice shot of nostalgia it's still a very effective park, but I have no idea if I would be as enthusiastic if I was bringing my own kids.