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I think your additional lines and can is adding too much friction and causing high crankcase pressure, which is ruining the engine, creating additional blow-by and allowing blow-by to mix with engine oil and circulate around the engine causing deposits and leading to eventual wear and failure. Its probably worse than a breather.
You never measured the crankcase pressure or you would see the problem
As we add lines or hose to that exit/entrance port on the valve cover, pressure rises inside the crankcase, all else equal.
For example if you put a breather on the hose at 1 foot, then 10feet, then 100feet, then 10,000 feet, the highest pressure in the crankcase will be when the breather is at the end of a 10,000 feet of hose.
The shortest route to the air filter (breather) is the lowest crankcase pressure. Remove all the extra lines and useless volume of can and it might save the motor. Otherwise it will eventually fail and the clogging of deposits cannot be washed out the engine will become un-reusable, non rebuild-able. Sure you will try to rebuild it but it will fail shortly again because the hard carbon forms diamond-like deposits in orifices which cannot be cleaned.
I recommend do yourself a favor for peace of mind, get a $5.00 used 1-bar map sensor from any vehicle, install it to the valve cover (crankcase exit port on valve cover close to the crankcase) and attach a 5v signal source to it, using a $5 multi meter from harbor freight is fine, then read the map voltage at wide open throttle. Get a video. Voltage goes up, your engine is in trouble.
Pressure over atmospheric is a scalar in the crankcase, like inside a tire, it has no vector, the molecules collide with all surfaces in all directions, that is what keeps a tire inflated at atmospheric pressure. There is a partial pressure of blow-by gas which will dissolve into engine oil and scalar pressure is forcing oil into engine seals leading to oil leaking. Furthermore at the end of power stroke scalar crankcase pressure forces early ring switching, causing extra blow-by and allowing oil to enter the ring pack and glue the ringpack, forming deposits on piston rings and interfering with ring to cylinder wall sealing.
Its a slippery slope once you modified the crankcase without doing the measurements necessary. Like installing a fuel pressure gauge and never checking your fuel pressure. OR a boost controller. Crazy but everybody does it so it must be fine, right? Like smoking, everybody is smoking, must be fine?
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