I'm not the expert here, but I've studied your photos and this is my opinion:
I'm not sure I would change anything on that one! I wouldn't go with any more taper personally. The 30" draw thing is affecting my judgment, I'm sure. You don't want the outer tips bending more. You don't want the limbs bending more at the fades, but I think it's fine like it is. I just don't see what there is to be gained with more taper. To me the limb looks to be bending really well. If going with more taper, you would definitely need tip wedges and power lams, but don't know if you would gain anything. How did you get the 172 fps? Was that 28" draw or 30"? Fingers or release? Shot by hand or machine? If 28", fingers, and hand, those are good numbers.