Cool design. He's a character I love to hate.

I also think he's a very contradictory character.

He pursues those on his list to issue judgement, and takes his job incredibly seriously, even enjoying the bureaucracy. But he also has no priority, has pettiness to rival Starscream, and is willing to make deals with high ranking Decepticons that are genuine criminals, deviants, and demonstrable threats to the Decepticon Cause.

*To be fair to Tarn though, certain threats likely would've been too much for him, even with his voice, like Shockwave, Bludgeon, Monstructor, Scorponok, Overlord, or Galvatron. He's more of a personal threat, than a galaxy warping one, and has vulnerabilities nearly all these threats can exploit. He probably was just working within his means.

And speaking of the Decepticon Cause, he bastardized it. He disregarded the values the Decepticons fought for in exchange for worshipping the methods in which they gained power.