The consistent distance gaps despite loft gap variance can be tied in part of clubhead design. Unlike some models with tight loft gaps at long end, Z565 does not mess around with shaft length. Some models going from half inch to 3/4 shaft length increments at long end. This messes up some who play long irons because of the uneven shift in length.
Srixon makes excellent irons and gets overlooked somewhat because not all major stores carry them.
You shortened your swing? That's the best news I've heard since you agreed to stay with Sweet 16 in clubs!!! 🙂
Final sentence says it all.