Well, this is definitely a keeper, I'm hitting the ball very well ever since I've made this change. I feel so much more in balance now; as I said, I think before I was coming out of my posture (standing up) through impact just to keep from falling forward flat on my face. My weight was so far outside of my toe line there was no other option save for tipping over. I think I exerted a lot of effort just to remain upright.
Now I'm finding myself staying in my posture, and with the nice balance I feel like I can really go at the ball. I hope
larryrsf isn't looking

, but I've also started really firing my hips to start my downswing. It's something I've always known good players do - heck, you can see it if you watch swingvision clips on youtube - but I've always been more of a complete body-rotation, everything-at-the-same-time kinda guy. I've toyed with firing the hips now and then, but never stuck with it; now I have, and with results. Some balls I've hit the past few weeks have been absolutely annihilated, like 230 yard 16* hybrids and 250+ 3-woods, never mind some of the drives I've hit.
I think this setup change is going to be permanent - nothing but good things so far.