Is this a good firewall design?

Hello Reddit mates,

I am working on implementing a data center firewall and F5 (WAF) with the following consideration:

• To secure and control the access from the user (access layer) to server farm such as IPS, Access policies, AV
• To secure Web Servers in DMZ
• East-West traffic inside server farm for stopping malware propagation for critical servers.

Please comment on this design, if it is good

https://www.dropbox.com/s/r1l14k0z85mp3iz/design.jpg?dl=0