The pre-show makes me think someone went to Movie Park Germany and liked the Van Helsing queue.
I'm not sure what you really expected regarding a lot of the older props/ghosts. Few would make sense in terms of the new storyline (everyone has vanished, but the undertaker is still there for example) and in terms of budget I think they were essentially stuck reusing a lot of Duel mechanisms which were always cheap and somewhat off-putting.
Based off POV viewing, there's a definite air of not quite completeness about it. 2 sections in complete darkness certainly doesn't make sense to me considering it's quite filled in everywhere else. Presumably timescales and priorities as with all projects.
I'd imagine they'll tweak and edit things as they go. Much like the original Haunted House. From an initial standpoint though it looks a vast improvement over what Duel had turned into, and shows the difference 30 years makes.