It is likely faster/easier to use the also newly finished tunnel from the Summerholt area. Just find highway route to Weird Wonders from anywhere near Summerholt. The tunnel goes directly west/east close to Meadowdale (south-west of Summerholt).
+1
The current state of affairs just feels very incomplete. Rooms on the uppermost floor look pretty shoddy.
This alone would be an amazing addition! In a perfect world, you'd also be able to extend walls up until they hit the roof.