¿HowTo: Convert between Art Text and Frame Text?
Granted it took Adobe something like 20 years to put this feature into Illustrator, so I'm not expecting this to appear overnight, but is there a way to convert between these two kinds of text types?
While your reasons explain why you want to convert art text to the more capable frame text, it is not obvious how any of them explain why you need to convert the more capable frame text to the less capable artistic text.
Also, a few of your reasons do not seem to make much sense without further explanation, for example why you cannot see the same measurements in the Transform panel with either kind of text object.