Might be slender might be true. Looking at the picture I can see a problem as well. If you have one shot and this happens, there is a problem. I don' know if in panic you really remember how this QR has to be activated in a correct way.
I think Fone should go with the flow and get a pushup release, like the majority, doing their part to make the sport safer by having one type of release.
. If I remember correctly, this is an antique design used by Bump and Jump a long time ago.
Although I never have used Fone's, I still have an old B&J CL somewhere. It was a much worse design than most modern systems. Besides having to pull the release toward you (probably while on top of it), the velcro mess sometimes would snag on some spreader bars.
When I saw the Fone system at an event a couple of months ago, I could not believe that anyone still used such an obsolete system.
Additionally, I dislike QRs which prefer operation by one hand or the other in case the preferred hand is disabled.