When Mazda put out their line of skyactiv engines in 2012, they included and integrated "oil separator" and those DI only engines seem to hold up fine without port injection. there are many ways to skin this cat.
I don't think those valves look good at all especially if there is a catch can type of system. I would have expected better. Those look like my 2008 CTS 3.6DI when I did intake gaskets...and it has no catch can system.