Tried Multiplayer again and had the wife stream her client so I could see how synced/buggy it was. For the most part it was pretty solid, but noticed a few things:
>Aperture is not networked, adjustments don't show up on guest's client
>Poses would sometimes be a little off (eyes more closed on her client)
>Rotation was perfect 95% of the time but bugged out at the end
>Guest on tandem bike could not get off without resummoning it to force
So still needs a little love, but a huge improvement from the first time I tried.