I think it’s a great idea, and a great question. My advice - just be careful what you do with your marker/pen. If it’s magnetically clipped, it could fall off as you put it in and pull it out of the shelf. This used to happen with my original reMarkable folio all the time when the device went in/out of my laptop bag or man-purse. I got a new case before I totally lost the marker (which is a cheaper option.)

I agree, very annoying. It’s almost like a paste action with that second refresh. I hadn’t noticed the second one because it’s a couple seconds later. My advice at this point is to be careful to make sure all your changes are saved properly before changing pages or doing another operation.

I use circles and squares a lot. I prefer deop shadows so they stand out on the page. I also created calendars, reminders, tags, and the rarely used 🔥 and 💩.

I agree, they’ve spent a lot of time on the typing/Typfolio features when there are some basic features that could make the whole experience better. Right now I spend a lot of time copying/pasting icons for bullet journaling. While not a bad experience, it could be better.
And I have no immediate plans to get a keyboard. If I want type, I’ll use my laptop w/Evernote. :)