Thanks for the inside baseball, anon. Find it interesting that they're already redesigning the Great Hall. Not an expert in this field, bu doesn't seem normal that an airport is doing a major remodel so quickly after opening.
https://www.enr.com/articles/42184-denver-airport-officials-unveil-terminal-upgrade-plan
The project will increase the capacity of the 1.5-million-sq-ft terminal to serve 80 million passengers per year. When the airport opened 22 years ago, it was designed to handle 50 million passengers a year. In 2016, DIA traffic topped 58.3 million people, according to airport records.