Whilst there are clear deficiencies in places, this is just due to the fact Shemue is an aged classic. But a classic it remains and whilst other games may have surpassed it from a open-world game point of view, there's never really been anything like Shenmue for nearly 20 years.
In conclusion, The Infectiousness Madness of Doctor Dekker is an admirable attempt at a niche horror title, marred only by the U.I. of the particular version I played. I'm already invested in their next game, I'll just make sure I pick that up on the Switch.