Yeah, better left open than rushed to an unsatisfactory close. This really feels tragic though, as though Gulliver's Travels, Alice in Wonderland, or The Hobbit just kind of ...stopped... halfway through due to the indifference of some money-grubbing publisher.
This is what mostly people are struggling, to continue a story that was great on the beginning. Instead to find an inspiration or doing something creative, they end up with the same common storyline or just end it like this one. Thank you.