IMO, in the case of KY, the less antler-high-grading is more the result of short gun seasons than the 1-buck limit. If Tennessee had a 9 to 14-day rifle season (like KY), we would have less antler-high-grading, even with our 2-buck limit.
But be careful for what you wish.
Everything is a trade-off.
IMO, the 2-buck limit is the perfect compromise between all factions.
While I actually wish we had fewer gun-hunting days in TN, I prefer what we have now rather than SO few as in KY. My wish is all TN buck-hunting opportunities simply end a bit sooner, such as January 1st being the last day of the season, with no January juvenile hunt, no more deer hunting period until the next fall.