Just learn normal touch typing, its fast enough…

How long have you been practicing on it? Only takes a couple of days to get to a workable speed

The letters printed on the keys don’t control what they do. You can change what they independently of what is written on them

Shift not on thumbs with that many thumb keys?

Two small (110mah) batteries in my sweep last me more than a week and charge in less than an hour. I think you might be overestimating how much battery power you need.

There are a couple 3d printed corne cases that allow for large batteries though:

• https://www.printables.com/model/385742-corne-case-modified-for-larger-battery-choc-switch
• https://www.printables.com/model/543259-cbt-corne-battery-tented-case

Pretty sure it allows you to drag and drop the firmware file in the file browser instead of flashing through the terminal/qmk toolbox or whatever. Not an advantage to me but hey, some people use a file browser a lot I guess

I assume they wanted a sweep with a thumb cluster they find more comfortable. Plus I think those controllers provide easier flashing and programming