They will probably multitask instead of focusing on one piece of track at a time so everything will go by slower but they will get more done. At the end, the coaster would probably be done faster if they multitasked than if they did one piece of track at a time.
Especially that the biggest clue was a "very big project" which could mean anything but I really think it is for a new coaster. Especially since they removed Skyrider, which probably means a new ride that will replace Skyrider. Still I cannot wait, too bad we do not have anymore clues since the park is closed.