An Algosec study showed that 56% of respondents who deployed NGFWs said it increased their workload. You can take steps to reduce the complexity level, though, and this article can get you pointed in the right direction to do that:
About The Author
Debra Littlejohn Shinder is a technology and security analyst and author specializing in identity, security and cybercrime, utilizing her past experience as a police officer and police academy/criminal justice instructor. She has written numerous books and articles for web and print publications and has been awarded the Microsoft MVP designation for fourteen years in a row.