I thought it was quite nicely done! The "I Grimlock" part was pretty clever and "70's Blacksploited" Jazz made me chuckle.

One thing though, with mirror universe style stories, are the characters menat to be just evil/good versions of the good/bad guys or opposites? I thought that the personalities would be opposite to what they really are. EG Jazz would be an extreme redneck, grimlock weak and cowardly etc.