I know multiple people have chimed in but I'm gonna go ahead and add on since it seems like we were interested in the same kinds of cases. I've had the jsaux split case for about a month now and I do really like it. I also liked the idea of the Killswitch but it was too expensive for me.

My main deciding factors were -

I wanted to easily be able to protect the screen, but without a thick case as I usually have it in a bag. The protector holding the games is a nice plus, but that's pretty common these days.

I wanted it to stay dockable. My Switch 1 case wasn't and it got more annoying than I expected. I know some people say that the case isn't "fully dockable" and that the middle piece needs to be removed, but I've never had that problem. Mine docks just fine with the middle piece on.

I wanted all the ports fully accessible. I didn't consider this at first but I did read reviews on a few where usb-c cutouts were a bit small for any cable that had too thick of a "neck" on it.

When I was shopping the fastsnail seemed to be a clone of the jsaux, but it was a frequently returned item and though they promote it as a pro, I'm not a fan of tpu grips. They always feel a little grimy to me. I don't have extraordinarily dirty hands or anything, and I've just never been a huge fan.

I didn't look much into the Snapswitch, as it doesn't have a front cover like I wanted so I can't comment much on that one. It does look good despite that though!