At the moment it is possibe to configure which userroles are allowed to execute a microflow. Buttons and other UI element via which the microflow is executed are automatically shown/hidden based on the userroles of the logged in users.
It would be very helpfull if it would also be possible to add an expression to a microflow which defines, based on the value of attributes of the parameters, when the microflow is executable. The expression should only make use of the parameter variables of the microflow. Buttons and other UI Elements should automatically hide or disable themselves when the expression is not met. This could save a lot of visibility expressions on menu items and buttons.