Hello,
I know some things are not as intuitive as it should be and visuals are basic..., but there is many options and you should be able to tune it into your liking.
What you were probably looking for was the "Edit group" window (when you right click group name) where you can change number of rows / columns and even make the group scrollable to fit more dials.
The synchronization should work without any issues across devices and browsers, just make sure you are logged in the same account.
Regarding most-used dials, yeah, this is indeed missing since there is no tracking of user activity. I will try to implement something something for it in the near future.

Best regards,
Juraj Mäsiar