As per the expert analysis the SFM paper(old course) May 2019 was a wee bit lengthy as compared to the last two attempts. However, it was not very difficult. Most of the questions were based on fundamental concepts. To read the expert analysis of the paper you can visit this link https://www.caclubindia.com/articles/question-papers-analysis-of-ca-final-old-and-new-may-2019-exams-38149.asp. I found the article very helpful. It contains expert analysis and tabular dissection of all CA Final May/June 2019 papers.