MD427 , yes ..... removing the PCV can increase crankcase pressures . Answer is simple ... a breather in the VC on each bank will let in enough air for that to not be a problem .
I tend to agree with others that the PCV is where I would start since this ( if I read your posts correctly ) just started right after an
oil change and wasn`t building up over a time period .
I had to play around with a bunch of different PCV valves before I found the right one .
Pull a few plugs , with that much
oil usage , they should be covered with
oil .
The PVC check is the easiest one of the solutions to try first . I would tend to write off the VBC baffling as the problem just started and I`m guessing the VC`s have been on the engine for a while .