The accuracy/500yd test one was interesting. We all knew the front end was pushed around too easily, but I hadn't seen that workarounds were getting good enough results. "Everyone knows you load up a bipod" shooting advice is derived from free-floated bench rifles that dominate the long-range scene...and the RDB isn't free floated. I suspect it's more like sling-shooting mechanics, where consistency is what's important, not simply pulling on the sling hard enough to lock it to your shoulder.
My workaround, which I have been happy enough with but haven't had much chance to shoot for consistency, is to simply use the grip as a monopod. Similarly, I'd be interested to see how well a Tavor-esque bipod mounted on the grip would isolate the front end & possibly improve accuracy. Make it just tall enough to use a 30 round mag.