If it weren't for the time, I'd say more than I will here. If you can take the trash out of what goes into the engine in a normal PCV setup, then you'll have zero problems. And if you think the PCV is bad, try not having one. As for the EGR system, they are very important. EGR valves are actually a very amazing invention IMHO. Oxides of Nitrogen (NOx as we call it due to the near limitless number of them) happen to be the #1 killer in a 5 gas analyzation in Exhaust gases. NOx readings increase in conciderable numbers when heat is around, and EGR Valves actually cool down the in take charge of air into the combustion chamber, thus also reducing NOx readings. An Inoperative EGR Valve can easily accomodate for a good 1000+ reading on any 5 gas analyzation, and NOx is one extremely poisinous gas at that. If you want to damage your engine by dissabling your emissions setups, go right ahead. The EPA really is a pain in my butt at times in this field, but I can honestly say that these valves work extremely well; the EPA is to thank for most all of your engine computers and electronics. Damage your Catalytic converters at your own risk. Some newer engines are being produced by varying manufacturers with no EGR valves, but controlling emissions is a must. A lot of R&D was put into your vehicle, and I dare say that the manufacturers know a bit more about it than we do (def. myself included).
Dustin