I think you've pretty much come to the same crossroad as everyone else. I'm not doubting the intelligence of the guys who worked with/for Chrysler that came up with the theory (in addition to tons of other great info), but it flies in the face of everything that a lot of us know about hydraulics and pressure. The story as it's told, is that the theory on the #4 was developed in a no pressures situation, using a bare block and a garden hose.
Like anything else, you have to take the info available and do what you're comfortable with. For every time that people scoffed at something that sounded odd, but turned out to be genius, there's 1000 times where something odd was just that.
Personally, I tubed the passenger oil main, and blocked supply to the drivers. I also reduced oiling to the cam by re-drilling the cam bearings with a .125 hole, and supplied full time oiling to the heads from a point earlier in the oil system. My experience agree's with the idea that keeping as much oil in the system for the rods/mains will do nothing but good things, and I consider all of those mods to be steps in that direction.
