What is the matter with original plays staying ori...

What is the matter with original plays staying original? My husband and I went to 4 Christmas Carol Shows and only 1 was a pleasure. We found smaller theater that weren't afraid to portray the story as Dickens wrote it. They were secure in their ability to do it justice without having to change it. There is a reason it has lasted all these years because it's a classic and nothing wrong with a classic.