Doug, that one is just plain scary-looking to me. I'd go with the junction box option as well. How much trouble would it be to extend a few MWBCs to that location to re-feed the circuits from the main panel?
I can't imagine an installation like that where a non-pro would be dabbling with all of those live components. It makes us appreciate the 'dead front' design of today's panels, even the ones that are 60+ years old.
