Make it possibel to uncomment an activity in a microflow without having to change too much the microflow itself to accomplish this. In any programming languange, there exist a comma or dubble slashes to do this. I miss this option in Mendix.
A workaround would be to include an exclusive split with the simple condition (and label) "false" before the activity that needs to be disabled and an arrow from the exclusive split that jumps over the activity.