I never viewed this as a too much eye relief problem. It seems to me that eye relief is a function of design, so that if a certain eye relief is desired, that is a design attainable goal, within optical design parameters and restrictions. So the eye relief is what it is based on design. It has always seemed to me to be a problem of inadequate eye cup extension, as has been referenced by more than one post in this thread.
It seems to me to be a simple problem of using inexpensive, already available, off the shelf design eye cups, which as a result of being generic in the middle of the road designs, are far too often lacking in needing another detent to increase extension.
It seems offering some sort of longer eye cup, either to replace the original screw on the already threaded eye piece or as a longer rubber cup to replace the standard offering would be a pretty simple offering as an accessory..