Sorry, but IMHO no. You’ll get more speed because of the weight. You might get a tiny bit more efficiency because of the limb angle... but even on an Uukha limb that is way out of the designed profile. Effectively you’re underutilising the shape. However, it might be what works for you and Uukha do have strange recommendations for length vs draw length. The folks at Perris would probably have a better idea of how that would work from an energy/efficiency point of view.
Draw your bow back and get someone to take a photo. Then draw it another 4” and get someone to take another photo. Then overlay the photos and you’ll see how differently you’re working the limbs.
At 28.5” a 72”
Hoyt would feel like a rubber band. And with a 27” riser I found a medium limb to be more stable at drawlength around 31.25”. At 32” a long limb is more stable and works in a 25” or 27” riser.
To get energy efficiency you’d need to drop to medium or even short limbs in the 27” riser. But efficiency is not the same as accuracy. You may even find that the setup makes you more comfortable at the higher weights. String angle may also be a sweet spot for you. So if you like it and it works for you, GREAT... stop thinking about it.
Only other drawback I can see is correlating arrow spine to the setup. But then you are kind of having to extrapolate with most of the hyper
recurve limbs anyway.
2p
Stretch