I am not saying just immediately dismiss ugly FL graphs. All I am saying is that if the AHI is nice and low and boring...and I am sleeping good and feeling good....that I wouldn't go spending enormous time worrying and doing all sorts of pressure increases (or letting the machine go higher if going higher causes problems) just to clean up a FL graph that might not clean up anyway.
Investigate....yes and maybe even try some more pressure experiments but if the FL graph is the only thing ugly and the person is sleeping good and feeling good...and the more pressure experiments wasn't cleaning up the FL graph then maybe back up a bit and not go to war with the FL graph if more pressure doesn't clean it up and there's nothing else we want to fight.