The entire series is WAY too superficial; and, in the rush to get through, the history suffers.
First of all, they acknowledge that fact at the beginning of each episode. Second, this is just another chapter in the on-going exploration of WWII. You have to read history, TV by it's very nature is "superficial". There are nuggets of wonderful information to be taken from any telling of the story of WWII. Take it for what it is. For example, I was brought to tears by the retelling of a story on Guadalcanal about the single shot fired and the moaning and crying of the person who had been shot. The person telling the story explains how it was night and you could not see anything, and they were all exhausted and just wanted to sleep but the cries of the wounded soldier keep them awake. He wished that the soldier would just die so they could sleep. In the morning he finds that it was his best friend. He has had to live with that thought for his entire life. It was something, I am sure, that happened a lot during that war.