The strength of the knot (or splice) is a bit of a red herring. Modern
line is sized not by breaking or working strength, but to provide adequate reserves after chafe and sun rot. Any decent knot will provide adequate strength. A good knot will minimize movement and chafe, as well as allow adjustment of the
line.
What is nice about the passing the standing end of the
line through an eyesplice, with or without the extra loops around the piling is that the
line can be adjusted from on board the boat. That works best on transient slips. In your home slip, I prefer having the eyesplices on board at a preadjusted position so that I can quickly get them on
cleats in the right position when I am single-handing.
My gripe with tying up to a piling or bollard by looping the
line a couple times around a post and then passing the standing end of the
line through an eyesplice is that the
line loosens and tightens as the boat moves allowing the
line to chafe and work its way down the piling.
Jeff