I think the problem is that the Walk Again Project isn't one of those DARPA funded projects, and they don't seem very open about their technology. Basically, you see all those great demonstrations, but these guys were working to catch up to them, rather than work with them. Still, this will spark imaginations in other groups, leading to a faster development of other brain-controlled exoskeletons.

I suspect that Walk Again wanted to play it safe. Sure they could have done things to get a better kick, but those all run the risk, however small, of throwing the machine off balance. And the risk of the world seeing their rig lose its balance and fall was likely deemed much too costly to risk for a big kick.