What I did for the oil leak was found a pic of a Crawford AOS cut in half. Both the crank and valve vents enter the main chamber together. Then they can drain back to the crank vent (the back one by the turbo, the same one that enters the AOS). So basically the crank vent hose comes out of the block, into the AOS and back to the block. The valves also can dump there "stuff" into the AOS, then it all drains back to the crank vent or "block".
So what I did was make a AOS that looks just like their's. I took my catch can and made a baffle like their's where a second chamber has some little holes for oil to enter if need be but it also has a drain on it so it will flow back out. Then the top nipple sits inside and "should" suck up nothing but air. However at the moment I have no place to mount it while I'm TMIC. So what i did was kind of what you said. Before the valve vents dumped almost right onto the ground. Now they run high up to the top of the IM to a tee. Instead of then running it under the car then I ran it to the Y piece where the PCV used to be. So if valve oil does blast out it can go 2 places, back to the block or out the crank breather and onto the floor. I figure if the AOS is already connecting them together and draining them together back to the crank vent why not do it sooner.
This is only for the time being till I get all my 09 stuff swapped and get my FMIC back on. Then ill split the lines up, run to my AOS, then back to block. Only thing is instead of running a line back to the inlet my AOS will just have a filter on top. I hope it's semi large volume will be enough so oil doesn't come out of the filter.
Scott-2011 WRX 335HP 394TQ 93 VF52!