ok well about your pcv you can point it down or get a small filter for like $15 i think it looks alot better and you wont get oil splatering every where
about the vacume you say the vacume is very responsive but the bost takes a cuple of seconds to rejisture
i have the same thing
in my car its the lag of building bost cuz i have a big turbo and a huge inter coller
where did you get your vacume source from?

 

my boost gauge comes on right away, instantly