Danny, I could have sworn the first time you told this story, Stan was stuck through the corners while you were working hard to hold onto a drift. Some stories are like green tires - they improve with age!
OK sorry, just having some fun here. Yeah, you can drive a swing axle hard. But you worry a lot doing that. Or, at least I think you should, until you know your car well. With IRS, there's less to worry about. You get more of a warning before you're in the weeds. And at the limit, you're more likely to slide than flip.
You can, of course, make any suspension better (which I think is what the OP was asking about) so what you've done to your car is good to know. But for someone new to these cars, I think the message should be that swing axles are something to be wary of and approached with some respect.