To answer (most) of the questions posed:
Shortening of the red tee has occured and will continue. This shortening was (and still is) much needed.
The less "solvable" issue concerns the tees that the men at our club typically play - the blue and the white. There are spots where it would be great to lengthen some mid or short length par fours and par fives, but we do not have the land to do this. It is only on our longest and toughest par fours and par fives that we do have land that would allow for lengthening.
Could we create a middle set of tees for the white markers? Absolutely. Is anyone asking for this? Absolutly not. Moreover, if we did create a more forward version of the white tees, I can already hear the cries from our membership. "Why did you change what we had before? I just want to hit from my same old white tees!"
The architect was retained in a restoration effort (overgrown trees, alterations to mowing patterns, green expansions, rebuild/augment bunkers, addition of forward/red tees, etc). But he was also retained because there is evidence that Donald Ross spent precious little time on site. The belief is that, other than the routing, DR did not spend much time on the design and build of this course. Thus, much of our effort focuses on what DR would have done had he spent more time on site. In this case, we wonder if he might have been more thoughtful when considering the yardage discrepancy between any two sets of tees?