Good to hear. The current Dr. Who Experience in Cardiff is a walk through attraction with a walk along guide. It goes through about 5 or 6 different rooms. The attraction itself is up to Disney standards. It does not have the huge capacity of a Disney attraction . . . right now. Put it on a conveyor, and it certainly could.
Unfortunately, the 5 year lease in Cardiff runs out this Fall. I imagine the cost to man it and maintain it is not insignificant, and Cardiff probably does not have the tourist flow to fund such a great thing. But put it in a popular resort or near a major city, and that thing would be full every day. Believe it or not, my family's decision to spend a couple weeks in the UK this summer was in large part the desire to see it again. Yeah, for Whoovians, it's that good. For non-Whoovians, it may convert you.