Just to clarify what this award actually is...
It is NOT an architectural award.
It is NOT a design award.
It is a 'construction award'.
It was NOT won by Dreamworld. It was won by Alder Constructions.
It is NOT national. It is given by Master Builders Queensland.
It is NOT state-wide. It was only for the Gold Coast.
The very specific category that it won was 'Tourism and Leisure facilities (on the GC) up to $10M.'
In 2019 this category had no winner because it had no entries for the GC region.
In 2018 it was won for the Woodroffe Hotel (Southport)
In 2017 it was won for the Doomsday Ride at MovieWorld (who even knew?)
The category did not exist prior to 2017.
It is highly probable that this was the only entry for this category in the awards for the GC region, or that it beat out a surf club redevelopment (like the Sunshine coast region winner) or a Hotel Lobby redevelopment (like the Brisbane winner - Ovolo).
This is not a prestigious award. This is a small, local award for construction companies to help promote themselves locally.
I am sure the construction was challenging and they were likely given the award just for solving all of the technical difficulties with the retro-fit. But, as was discussed at the time and as @Slick said, the final result of the lumpy bulbous mess of a building is not at all like the promised renders, and the design of the building destroyed what was left of the park's entry statement aesthetic.