Happy to hear that it is musically very similar to the Linnstrument. With regards to question 2. This has to do with the pitch bend ranges that can be selected in the Sensel app. When having 13 notes per row the pitchbend would be a little out of sync with the note fields. Would be nice if the sensel app would allow a custom number in mm to improve this. I can imagine that 1.5 octaves also could work really well. Two octaves is personally to small for my taste.
To my knowledge, the Linnstrument is configured to have the Y-axis control cc74. This setup does the same. Maybe if you turn that off you could strum the notes but I’m not sure.
That’s really nice to hear, great what the sensel team has been able to create.