Not sure why you would need to see someone do a triple step to remain in sync. As long as they are on rhythm and keeping good connection, it shouldn't matter. The leader and follower don't need to be doing the same footwork at the same time.
For me it's ok as an exception, as maybe styling or the opportunity
taken or given for partner to do her own thing a bit.
Sight is part of the connection and confirmation of being together in time.
You may be be arguing that it isn't necessary but actually I think
the feel of a rhythmic connection with your partner and with the music
is part of the dance.
I always come back to the argument too, if you get rid of the triple
step has WCS morphed into something else? And if so, what exactly is it?