First of all I love the picture of the carnival you used. It makes me hope that someday the plaza’s boardwalk will be as colorful as this place.
The pendulum ride does not appear to have been terminated. It is only shelved and has to be remade from the ground up. Someday it will be ready.
As for other rides, I have also suggested that they implement the dragon carousel seen in Virus Theme Park.
I believe the reason why many rides are not present right now is because they would be large moving entities consuming boardwalk space and impacting plaza performance.
They were also focusing on games more than rides.
Then again, I’m sure smaller rides of a simpler design, such as the Viking ship, could minimize these potential performance issues.
Furthermore, if they do happen to make the cut, perhaps they could be added as miniature milestone items as well, like the Ferris wheel, or be sold in the Toy Stop.