I was thinking that we use shift and  and even  followed by [#+=] that simply using the TextBlade layout and treating its  as it currently is, would be a welcome relief over using 2 meta keys. Plus the  is sticky which is great.
It's also good for non-TREGgers to practice. Maybe potential future customers too if there is a several monthb backlog.
My issue is the hit targets are currently truly too small, and I think making them taller might help, but yes they would be narrower as TextBlade has 12 pads left-to-right whereas the iOS keyboard one has only 10.