I totally agree with you! I'd much rather be rejected than put through such intense ambiguity. In trying to be transparent, the admissions committee causes a great deal of stress to the deferred students. First of all, why is there even a DECEMBER deferral batch if they make so few admissions offers to deferred kids in December...the vast majority of decisions are made in MARCH, why not just tell everyone they have been deferred until March??
Secondly, why does it say highly desirable December/March decision? What the hell does that even mean? If there is no 'desirable' or 'less desirable' group, why put the highly desirable label on all the deferred students? It's like they enjoy keeping us on our toes, anxiously waiting for what they have to say.
I'm glad I got into other schools, so even if UM accepts me post-March I'll gladly tell them to shove the acceptance up their asses.