Unusual routes to develop rhythmic and aural dictation skills

Right now I am assisting a composer who created a piano and vocal line for singers to practice their part for an opera. However, for the program she used if the beat is not quantitized exactly it will capture every rhythmic nuance (and error). Plus any two notes held will be notated as two separate voices. So, has anyone ever thought of using as a preparation for aural and rhythmic dictation having composition students scores "fix" such scores for performance. in some cases it reflects the composers own limitations as a performer - as the quantization of beats transcribes such oddities as say dotted eight, dotted eight eight note for a quarter note triplet played inaccurately (a common error though - I recall one of my aural skills teachers saying many people shortchange the last note of triplets which creates a salsa beat)