I don't see it as running the oil level low because it's a dry sump system.
I always found a bunch of oil in my stock air cleaner from day 1. This being my first dry sump engine, I would always fill my oil to the full mark. Now I fill to 1/4" below full mark (when hot) and I no longer find oil in the air cleaner.
I'm thinking (just my own theory) that since this is a dry sump system, a high fill level in the oil tank.will create a higher pressure for the scavenger side of the oil pump to work against. This in-turn has to create a slightly higher level of oil within the sump/crankcase during engine operation. That in turn makes the oil mist (droplets) within the crankcase more rich in oil content which easily finds its way inside the air cleaner.
Yes, no, maybe? I have no clue but a slightly lower tank level works for me also.