As a new user I'd like to recommend that a user is able to select multiple shapes at one time and then change them all to the same new shape. For instance right click on square A hold down control and also select triangle B and circle C. Once these 3 shapes are selected then change the shape so they are all 'clouds' or 'hexagons'. Having to select each one individually and then change it is very time consuming if you want to change how you've organized a mind map once you've built it.
Thanks!