Then why does it cost you spell points to use it ???? Thats like saying wizards shouldnt get the rage spell because its an ability of barbarians!!!! get over yourself already.
I hope they do implement wings in a fly spell form, the fact is even if its a single cast as a level 3 spell (average 20 sp base) it will not impact on a favored souls class. I have never grouped a Fvs because of his wings (although im aware people do request them for certain exploits) its either due to the need for a healer, BladeBarrier, or DR tanking.
Even if they double the spell point cost for the fly spell I'd still be happy to take it, not for its quick travel time, but its ability to get me out of danger quickly.
In fact I think the argument should acutally be reversed - "FvS can fly why cant my wizard?" - since wizards and the fly spell are core and FvS is not