It would be interesting to have a version of the show more centered on the English guy without any subtitles until he starts learning Japanese and have the experience of not understanding what is happening around him until he starts understanding too
This is how the 1980 miniseries did it! 😆
The viewer is supposed to go through the same progression as Blackthorne, being at the mercy of translation and body language/actions until he learns Japanese. There is some narration and you get subs as he learns the language.
From some quick reading, Blackthorne is not as much the main POV in the new series, but he is in the original.
It's on archive.org if you want to watch it.