I was playing a bit last night, and I think I tend to agree with you, it was a LONG time ago when I enjoyed the left handed style, and I realized that its not that bad using the left hand on the stick, and I didn't find it difficult at all.
So, yes, I think I'll be rethinking that design, especially since a whole 3 lefties will ever be playing the machine.
But, in keeping with my 'classic' design, I'm mounting Xbox control ports behind the coin-door (or somewhere else) so third and fourth players can be added easily, wireless being the ideal configuration.
-Mal