Progress report.For what it's worth I'll try the dealer again, and maybe they can confirm it's a bad shock or strut.
1. Replaced the original Michelin's, 60,000 miles, with General Altimax RT 43's. Much better ride with my 19 inch wheels, no more harshness, and handling still good. I mean it, ride is night and day. Had a performance shop do the tires cause they road force balance, and did a hell of an alignment.
2. Don't nobody laugh. To address the pitching side to side, I placed a 55lb bag of cement behind the drive seat on the floor board, and a 26lb bag of cat litter in the left side of the trunk. Ride is much more stable, however this is only an interm fix.
3. I purchased a pair of rear shocks from Rockauto for around $500, still waiting for delivery, and will advz outcome when I install them. As I mentioned before the left rear shock runs softer than the right, and it was encouraging to note rear lefts were out of stock at Rockauto, but was lucky to catch them with one in stock and now it's on the way to me. It's a shot in the dark, but if it works great, and if it doesn't that rules out shocks leaving the ride control being the problem. A point I can squeeze the dealer with. And, a big and, if things don't work out, I can always fall back on the cement/cat litter.