The PCV is obviously mean't to vent crank case gases and the crank case is full of oil, so some oil in the PCV system is expected. If there is excessive oil in the PCV that would mean either an improperly designed PCV system or excessive crank case pressure. Since not all Gen III HEMIs experience excessive oil in the intake I would have to suggest the later.

Catch cans originated with the forced induction crowd since high boost pressure result in high crank case pressures. I'm not convinced they are necessary on naturally aspirated engines, especially the Gen III HEMI. After all I've seen several examples of 5.7l HEMIs with 200k miles that never ran a catch can.