Problem with history-based drama is that, we already know what and why things happened. So it's the matter of writing the stories and characters to tally with those historical facts.

In my opinion Gou is lacking in that aspect during the first half of the series, resulting in non-consistent characters writing in the second half. However it managed to cautiously being truthful to history, especially after the death of Hideyoshi (around Ep31).

Over writing the child character of Gou was the worst thing I have ever seen in Taiga Drama. Some exaggeration is forgivable, but writing non-logical child actions and reactions is a fatal mistake for a professional writer.

Furthermore, some important characters have been sugarcoated to make them appeal more to audience, while few others were overlooked and didn't get proper writing, namely Ishida Mitsunari, O-ne and Chacha.

All in all, this is definitely not the best Taiga Drama as a whole. But it is watchable if you could close eyes on Gou's childhood story arc.