Joe I think the filter is probably more competent than you might perceive. Don't forget it is a labyrinth design with two meshes and I suspect the inner mesh may be finer than the outer. Anything that might impede flow would be a bad thing, of course. The lubrication system with end-fed crank forced delivery is quite advanced in my opinion on this bike.
What I do with mine is regular oil changes and scrupulous cleaning of the filter in hot water and washing up liquid and a thorough dry. All I have ever found so far has been very fine carbon residue during cleaning and the filter stops that, so it should stop anything else.
Also can't speak highly enough for running fully synthetic Mobil 1 15W-50 oil. Only down-side has been that break-in from complete rebuild took a long time as it is such a capable oil. Took about 1500 miles to get the bike to run at top speed?!