So sorry to hear of your injury, it's especially horrible with young kids. I also broke my ankle (doc said I was lucky to not need surgery) in an older O'brien lace-up binding and it was completely my fault. Way too tight everywhere and didn't think at all about release. Then I tried an HO xMax and even with things almost too loose I didn't come out in an OTF fall. My foot was half way out and I luckily just sprained the ankle. After that, I spent some time with a few different bindings to see how well I could release. What I found is that my foot size made all the difference. Others would release fine in a binding but my size 13 foot would get stuck, despite using the largest size binding. It makes sense. When a foot releases from a binding there are three points of contact that must be cleared or the friction at these points must be overcome. A longer foot needs more translation in order to clear all three points so gets stuck more easily. This all made me look at release systems because they are independent of the foot size. I personally went with the MOB system, mounted to my xMax binding and bungee changed to a paracord. The Reflex style would probably have worked in both of my injuring falls too but I like the MOB multi-axis release and fantastic customer support. To date I have "self tested" the MOB system maybe 4-5 times (I had some stack issues causing OTFs) and it has worked perfectly every time.
Take care of yourself, my youngest was 3 when I broke my ankle. I've also been through 3 non-ski related foot surgeries in life and two were with young kids. It's hard. Stay positive, don't push more than your doc and PT say, and don't stop PT too early. Next year you will be back on the water with new bindings and/or go with a release system. Key is to be personally content with the system selected so it isn't a constant worry while skiing.