Yeah this is the interesting thing about the requests for Recycle integration. It really could do with warp manipulation as well as the existing transient/slice manipulation. Which means a new file format (RX3?), a new Recycle, a new Rex API for all the other DAWs which support the format...
And I guess if there's going to be any kind of Reason integration, warping is such a musically useful feature it should be accessible by loop/sample based devices in the rack as well as audio clips in the sequencer, possibly with upgrades to all the sample based devices so that individual slices can get stretched (imagine a Kong with modulatable drum tightness!), drag and drop support, etc. Phew!