I've run into the same thing and I was planning to use the green loctite sleeve retainer. Haven't tried it yet, but I have high hopes for that. And I agree that it's weird that the original pipe was in there so firmly, but pretty much shows no retention at all when pushed back in once it was pulled out.
As for the PCV and catch can thing... With the EFI, things get a little more complicated. You need to either vent everything upstream of the AFM, or vent everything downstream of the AFM. But don't mix the two. Or vent everything completely separate from the EFI system.
In theory, PCV systems change direction depending on the engine RPM and load. So the whole notion of "inlet" and "outlet" is a little troubling for me.
At low load (low blow-by), high intake manifold conditions, the flow goes one way. But at high load conditions when the blow-by is higher and the intake manifold vacuum is pretty much non-existent, theory says that the flow direction reverses.
I guess the "normal" direction is pulled out the large pipe in the crankcase, through the PCV valve, and into the intake manifold. So if I had an "inlet" and an "outlet", I would connect the inlet to the big pipe on the crankcase and the outlet to the valve cover.