Personal opinion. As I've commented before, I ride the bumps and the steeps. The only way that I've been able to do it, is to ride with my "Soft Raichle 123 Hardboots" in the walk mode. They're duct-taped in the walk position. That coupled with flex-bindings (Burton Carrier step-ins), allows me to flex and absorb bumps and landings. I can go from a carving stance to butt on the board as fast as needed.
As I watched the Hardbooters, they all seemed way to ridgid. I'm in no way comparing myself to them, it's just an observation from someone who rides in as variable terrain as possible. As soon as I get too locked in to the boots, that is in the ride mode, everything is transmitted from the board to the knee, to the waist, to the back. I figured after I quit skiing that I wanted to make snow as fun as possible, and ended up in hardboots that had some attributes of hardboots, but still had almost as much freedom as softboots. Of course this doesn't hold true when strictly carving in Minnesota, but in Seattle, I don't want to do much except off-piste and bumps, and that would seem to be mimicing boardercross to some extent.
I've also adusted stance width lately, spreading it out a bit, and that tends to add more control to variable conditions, especially going from Cascade Concrete to skied out bumps and going to hard-pack bumps. Anyway, just a thought. Try everything and don't be afraid to experiment. I'm having the best year hitting the bumps so far, because I've screwed up some settings on my boards, and got out there and boarded before I realized what had happened, and it has changed my style, and performance.