Normally, whichever is closer to your core is the primary (i.e. hand become supplemental if there's also a connection on your back or hip). But even with a physical connection, visuals are still important, especially as supplements.(One of the challenges if there is more than one point of contact is determining which is primary and which is supplemental.)
I'd say it would have difficulty making finals in Novice at larger events.If a WCS performance could be danced exactly the same to a different piece of music, it's not Championship level; it's probably not even Intermediate level.
I missed the Switch It Up comp at MADjam since I was only there in the evenings, but did spend my time in the second room during the two hours of Role Play on Friday late-night and two hours of Steal Zone on Saturday late-night (non-traditional-role/switch dancing, and multiperson partner stealing as in the Three for All video I posted, respectively). Lots of fun to be had by switching things up.