Absolutely the writing quality had started to diminish -- it was at the point that I just felt sadness, and that I was doing Pratchett a disservice to even read

Absolutely the writing quality had started to diminish -- it was at the point that I just felt sadness, and that I was doing Pratchett a disservice to even read his later books, as I think the Pratchett of 10 years ago wouldn't have wanted them to be written, if he knew.