That's true... maybe the developer will add the feature in the next versions but, really, who cares if you are messing things up in acro mode and suddenly crash into the ground? What good is to switch to Angle mode to save a virtual quad? You'd better learn to fly it safely in acro mode, this way when it comes to the real hardware you will know what to do and your reactions will be faster and more precise. That is the main reason to practice with the simulator. The more you crash the more you learn.
Just my 2 cents.