I cannot believe that on-the-fly datum planes are a thing of the past. Why the hell would I want to see the on-the-fly datum plane in my model? The whole point of using on-the-fly datum planes, in my case, was to keep my model from looking like a ball of yarn (that is what some of my colleagues models look like after creating too many datum planes in all directions throughout the part/assembly).
If I need a datum plane for a feature and I will never need to reference that plane again - I do not care to see the plane after the feature is created.
The on-the-fly datum planes, in the models I have created, is only necessary due to the dimension scheme required in the drawing (design intent).
I will have to download a copy of Wildfire and check this out for myself. If the on-the-fly datum plane functionality is gone then that is one more con on my list for Pro/E Wildfire.