Jeebs, it's good to know that you are seeing more planetary details on the HypZoom and that you see using it often in the future - I too like the convenience it gives coupled with its good performance.
About being parfocal on different focal lengths, different users report varied results but the consensus seems to be that only very slight adjustments are necessary when changing focal lengths, and this is the same experience that I've had. If you have the chance, try someone else's zoom EP to be able to compare with the one you have now, because 1/2 turn of the focusing knob when changing from 24mm to 8mm seems too big an adjustment on a parfocal EP; like in my case when changing from these two FL's, I am able to achieve exact focus with very minor focusing knob adjustments. Hope you'll be able to sort it out, but you did say that it's just a very minor kink and otherwise your HypZoom is fine.
Just to clarify, I double checked the focus range and did it properly (from 8mm to 24mm) and I only had to make less than a 1/4 turn on the focus knob to regain focus from across the full range. I was clearly mistaken when I stated earlier about the 1/2 turn needed to regain focus.
The OP stated he was blown away by this eyepiece and although I don't have a collection comparable to his I would like to humbly agree with him.
If I recall correctly, there was a post before to the effect that specific set of eyes will require different intensities of re-focusing when using various focal lengths from a set of parfocal EPs so that what you're experiencing could well be only an effect of this variance (in upper limit). Again, if you can get hold of another zoom, try to compare it with what you have.
Being "blown away" and also "wow" are a normal reactions when peering thru the Hyperion zooms; I let my astro buddies use my HypZoom and the same words were used in describing the experience, together with the question, "..and this is a zoom?"