Boomer here, and American. At first, the show was confusing (modern language, actions and music.) However, once I just accepted the mode of presentation, I was genuinely and pleasantly surprised with finding out new and interesting nuggets, including an expanded context for the creation of the Church of England and other historical information (like the card game!) Much of this info might be old hat to UK viewers, but I ended up enjoying the series.
Regarding the criticisms about "dumbing down" history for modern audiences: perhaps this series should be viewed as a gateway for younger audiences to relate, i.e., "approachable history" that draws them in. I grew up on the insufferably dry stuff, and find a bit of fresh air here. There is an applicable quote from one of humanity's best poets: The Times They Are a-Changin'