This is an interesting article. Note that the concept of 26 man rosters v universal DH is neutral with respect to players share of MLB revenue. The DH, universal or not has little effect on player salaries compared to the whole. It seems to me that a possible compromise on the DH would be to make it apply to all interleague games regardless of location. That allows the NL to retain claims of purity and removes any AL claims of disadvantage when playing in NL parks.
What is of more interest to me is how far players share of MLB revenue has fallen. If people think that salaries are high now they better be prepared for significant increases as the MLBPA will clearly target at least 50% of revenues as a starting point in the next CBA. The current FA compensation rule will also go away. It clearly suppresses the FA market and actually punishes mid-level teams. I have a feeling that the DH issue (other than the compromise above) may get shelved for all
or part of the next CBA. As new, younger executives continue to populate all teams the NL objection will go away.
Universal DH a Small Help to Player Salaries | FanGraphs Baseball