It's great to see Barry weigh-in here and we need him to do that more often.
But the silly man places a priority on making a living rather than educating us with his experience.
All his points are valid-no contest. But I can say from my experience,
in my case, the open fill tube breather and the rear intake-mounted PCV causes no issues such as he mentions. And yes, the valve IS working.
The sheet metal tray in the valley prevents liquid (not vapor) from being pulled through the valve and line. The engine stays clean and the exhaust smoke-free. The Pentroofs never have the moisture milkshake. In fact, I used to run the S-shaped rear breather he mentions and it caused oily sweat but not dripping wet. This PCV solved that.
But one should certainly check for those signs when installing a PCV system.