If those are indeed catch can lines, it's not pointless at all. It looks like the PCV system was eliminated in favor of an additional vent line. When vented to atmosphere, the more crankcase ventilation the better, especially when boosting.
I was thinking a coolant swirl pot of sorts, but then I'd have no idea where those lines are running.
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'10 PW 370Z 7AT - wife's car - Project Raspberry Cheesecake
'08 Evo X - built motor+trans | BB-X @ 32 psi | CH3OH | self-built+tuned - ??? WHP
'01 Galant V6 - built motor | GT35R | self-built+tuned - 550+ WHP (retired) |