Could you consider a supporting different interface for teacher allocations that would accommodate large classes? there doesn't be a way to allocate all of submission to the teacher for assessment. The interface now requires that each name be individually selected and refreshes after each selection. This is very time consuming where you want to do more than 2 or 3 allocations. For instance, my classes tend to run between 30 to 60.
Right now it is very low on development list because of lack of votes. PLEASE VOTE: http://tracker.moodle.org/browse/MDL-26633