This post was intended to be a general criticism. It all comes down off to whether it feels "artificial" to the main audience. If the story is told convincingly, the power balance problem would have not really matter at all. But the power balance problem has been felt by many of the readers, and therefore it is a significant flaw of TG. And the "subjectivity" can be applied to all mangas, so I don't think that is a viable defense to TG.

The battles are all about delivery and standards. Owl, who has his arm cut off and still laugh, shouldn't be struck down by Mutsuki just because she kicked him between his legs. Not to mention that Owl has easily beaten Tatara right before he battled Mutsuki. Tatara has been portrayed to be very strong within Aogiri, as a SS~ rate. The battle scene confuses the readers to think whether Mutsuki is strong enough to knock down Tatara herself as well.

Kaneki, the king of ghouls, shouldn't struggle against a fellow investigator knocked down by Amon. Even with the RC suppressant drug. RC drug is a clear plothole as posted before. As I commented earlier, the explanation that RC drug has not been used previously in Aogiri battles and Antique because V did not want to break the balance has never been suggested inside the manga. Moreover, the RC drug has been used few decades before as modified handcuffs as shown in the battle between donato and urie's father, so the explanation that no investigators ever thought of using RC drug as weapons before Mutsuki makes no sense.