Hello Brent,
Maybe it's just me, but I think the Edit mode / Show mode toggle is a basic concept that is understood by those that use Qlab. With that said, before I came and read this, I was expecting to find an edit / show mode toggle in the settings. And because tapping twice brought up the edit mode, it made it very difficult to use for me, and would not work for the application I wanted.
I realize that making it so that you have to use two fingers would greatly eliminate this issue, but I personally think that the Edit / Show mode concept is ideal for most situations because once the show editing is done, you don't want to accidentally be editing a cue mid-show.
Also, Mic, I LOVE this idea, and we would be looking at using Qlab to control an event space that needs a simple set of controls. The ability to toggle a microphone on and off, fade in and fade out background music, trigger slides, and do some minimal light adjustment. The iPad app with the Cart function would make it easy for anyone to use, but we would want to keep people from editing accidentally. I realize that isn't a "normal" use for Qlab, but for what I normally use Qlab for, I'd also prefer and edit / show mode. But that's just my two cents.
Great work on Qlab 4 and the remote app! I'm excited to see what you guys do in future updates!