Different strokes for different folks. i've had worse habits than this and for me atleast, if it was available I wouldn't be tapering. In this situation for example, If I'm on 40 mg oxy i could for sure tell myself tomorrow i'm going to take 35 mg, but when tomorrow comes, ya damn straight I took atleast 40 mg. Tapering is by far the best thing you can do. It just doesn't work for everybody in a setting where they regulate their own dose.
I've had good experiences with spice. Maybe its just me. Where i'm from people love it or are scared too death of it. I much prefer the real thing, but hey, its something.