The blowby from the valve cover is mostly oil mist. It should burn reasonably well the way its ported to the turbo inlet. I don't know if there is any separator to allow the fluid oil to go back into the oil pan like on the '82-85 turbodiesels.
The oil mist going through the intake ducts does not bother me at all. When it is combined with the soot ported into the ducts by the EGR valve, THAT's when you really have a mess.
So, I plan to go with the stock method of venting the valve cover to the turbo inlet. I expect my EGR valve will somehow develop a malfunction.
Ken300D