1. Place dedicated menu or menu 'Insert' - 'Add children, siblings, parents' top! It is the most used menu. Open menu box from node opens the top menu (Clipboard) automatically:-( The menu 'Add children etc.' is risky as the 'Delete' button just below and inappropriately touched lightly.
2. Menu box opens under the hand = difficult to see choices. Any open in a horizontal menu OVER the node I touch?

I hope for a solution because it is too inconvenient to use MindMup on android devices compared to others.
Otherwise many good solutions !! :-)