It's not easy to start with Fastly if you don't have VCL knowledge, so it appears very complex at the beginning. Even though the documentation is well done, you need to practice a lot to be able to do what you want.

It is missing a "staging" platform to deploy a test configuration with all of the real settings, which would allow us to properly test before putting it into production.

It is missing a statistical view to see multiple websites of our choice at once. Currently, you can see statistics for only one website, or for all of your websites, but not for a list you choose.