It's "easy" relative to cutting a splice open and taking your snap out, then re-splicing it to another lanyard, I suppose.
I wanted to cinch on a crown reduction this past weekend, and so I just took the lanyard end around a 3-4" branch 540deg and hooked the eashook into a slipknot about 6" up the line (back towards my saddle). It worked okay (cinched and prevented the snap from being cross-loaded), but consumed more line than something more elegant like
@moss's lanyard here, or some solution involving a ring. Anything wrong with that, you reckon?