While I haven't use AWS Code myself, I have a few years of experience with Ansible.

• It doesn't play nice with Windows.
• Dependency hell is real.
  • Playbooks and tasks are built off of other playbooks and tasks, which are built off other playbooks and tasks. Actually figuring out what Ansible is really doing, to install mysql for instance, requires digging several layers deep into other ansible scripts.
• Debugging is a chore.
  • When a dependency needs updating, or there's a newer pattern for install/update of OS and libs, it can be very difficult to find what parts of your ansible script need updating, and where to update. Often it's in one of those playbooks you've built from, and you're left waiting for them to update, or taking on that whole playbook yourself.