Can you explain the mechanism of your fall? So I presume you're saying the binding saved your knee where a traditional binding wouldn't. Can you elaborate? I'm very curious as I'm sitting in the fence at the moment regarding these protector bindings.
I can give you a recent example where I wish I had a lateral heel release.
Was in lift line that had a relatively steep downhill, so had to wedge and be on the edge of stopping vs. slip. Next/behind me, kid not paying attention skis through and catches tail of my ski and drags it forward, and causing ski to really wedge out forward, and me to fall backwards with skis crossed up still in a wedgeand dug into the soft snow and both knees torqued and strained. Needed help to have someone unclick.
Another buddy this season, had a incident where in a missed moguls, got spun around and
ended up into a similar position with skis wedged in and knees torqued so couldn't move to reach the skis, and I needed to get to them to help them release the binding.
Both of these were mild strains, and ok by next day, but if we had knee issues it could've been worse.
I don't have the bindings, so don't know if they would've helped, but thinking this through though, you may need to play with the setting and have lower settings than the other releases, as both of these incidents were at relatively slow speeds.