Bad idea. I would not suggest you do this based on my experience. Oil consumption has pretty much stayed the same with the new CCV and is maybe slightly better now I switched over to Mobil 1 0W40. Still pretty much 1 quart in the middle of my 5k oil change interval. No complaints there. So no need to connect the hose to the valve cover vacuum outlet.Based on this info I will still connect the rubber hose just in case and can close it off later if it creates a problem.
I had a 1/8-inch ID vacuum hose installed (about 2 ft long) and had the end plugged up. Kept giving me this slight hesitation during acceleration from low RPM. Very annoying, like having a hole in the air inlet system. No codes and did not find anything with a leak test. Took the hose off last weekend and put the original rubber plug in place on the CCV and all back to normal without any hesitation.
Just to clarify, I never had to connect the hose as suggested in this thread since I did not get a significant oil consumption increase with the new CCV. However, connecting a certain length of hose (even when plugged up) to the CCV may create drivebility problems and will then require you to take a bunch of stuff out to access the CCV again.
Crazy how sensitive the air inlet system is.