Change for the sake of it here, they should have just brought over the set from TLS
I think moving to completely different studios, with new workflows, equipment and space (to build and to store) is pretty much the definition of change because it's needed.
Using the existing set would have meant they couldn't rehearse in the new space, and with the lack of on site storage at TVC, there's no guarantee there would be anywhere to keep it when not in use. The new sets will have been designed from scratch with the constraints the new studio has.
So, they didn't recreate the old set, but that was a creative decision, they'd still have had to make changes even if they did clome the design.