For the most part, I agree. I think changing it to 24 differenet days would be a catastrophe but I do think changing the locale is an interesting idea. Although it probably won't happen since it'd be pretty hard to make all the Los Angeles exterior locations look like another city for an entire year. I know there's plenty of shows that take place in other cities but they probably don't have as much location shooting as they do on 24. I've said it before but I think the drop in ratings is a combo of the quality of the episodes and the natural drop off that all shows hit.