Although some are - particularly ones with daggerboards, which give them 8' of high-aspect foils. I was noting your comment of -

"However, such routing considerations expose, to me, one of the fundamental liabilities of a multihull for offshore, or for this passage late in the season, in particular... Namely, their inherent lack of weatherliness, and ability to make a COG as close to the wind as a more weatherly monohull…"

- lumps all multihulls together and completely overlooks the fact that many, many monohulls also do not meet your requirements. Including many monohulls that are among the most exalted for their "blue waterness".

I'm not sure how you meant "weatherliness, but Doane's pictures looked pretty comfortable to me. More so than any from a monohull I have seen in those conditions.

Of course, we all could play the game of "who has seen examples supporting their positions". No one will win that, and everyone will be correct. And it will go in silly directions and to silly extremes.

Mark