Some newbies on Miro get lost through all the possibilities. It would be very handy to be able to switch on and off the visibility of the buttons, so participants see only the options they realy need. The facilitator (owner of the board) should be able to change these settings.
It will boost the flow and adoption of Miro.
You may even want to reference your Idea (including a link) as a comment in the following Idea that has been picking up a lot of votes:
Usage rights for facilitators vs. participants