I have filed a bug report/feature request. But obviously, Adobe is trying to kill off its old FrameMath. If they make it so no one will want to use it, then they don't have to keep supporting it. FrameMath had many shortcuts one could use so that one never had to use the FrameMath Palatte for most operations. While I was more comfortable with the Mac shortcuts, I have learned the Windows shortcuts and have used the ones available on both systems. You used to be able to type \lim (short for limit) and that would be the same as going to the Calculus pane and hitting the limit button. You could type \alpha and get the alpha character. You actually do not have to type out the full word, just enough for FrameMaker to figure out which one you were using. All of these shortcuts are gone. Accident---doubtful. No one checked, possible, unlikely.
I know that the concentration is on the new features with MathFlow, but the old features worked and made Frame easier to use. MathFlow and MathType have their place. But the Math editing and Math computational features of FrameMath were unique in my opinion. I usually, convert all my old documents to a new version of Frame for consistency. But I think I have to keep using FrameMaker 11 while it works or until Adobe puts back the features.