I'd go for option 4: Well marked or obvious signs and the trail squeezed to a no penalty drop.
I think the first option describes a single log that can work with flow because you can hop it, or third could have that squeeze and no penalty drop. Either would get my vote, third if you can pump it and drop.
Squeeze to a log your ride lengthwise is another good option.
I don't buy a lot of what's said and done regarding filters because I don't know what filtering is done when the rider can walk or ride around. OTOH, many seeing what looks like a drop put on the brakes or give consideration. Thus the squeeze, drop or ride the log long.
Anything but another pile of logs to ride over. Piles of logs and flow don't go in the belong in the same sentence. Log piles are are up there with banging head on wall or active pursuit of a colonoscopy for sport and entertainment.
If you've ridden across the road at Raven, Marquette, or Kettles skills area you might have an idea of what I'm trying to describe as a no or low penalty drop.