I know what you mean about asymmetry. I made my nephew a sweater with a center design that had 4 st. cables on either side of it, and they were both left leaning. I had to reverse the other one or it would have made me crazy.
I think your plan is a good one. Please post a pic when you're done. I'd love to see it.
(Also-just as an aside, I love Patons Classic Wool--I think it's great yarn for the price.)