Currently when signing up for a new freedom plan, you get sent through the wizard -- which bypasses a lot of the questions you might want to explicitly answer. Among other things - config for floating IP to use.
Consider allowing "skip the wizard" on initial setup - which would leave you in the same state as if you had created and then fully deleted a cluster and optionally deauthorized nodes.
The upcoming 5.5 release will remove the wizard, when we bring it back we will add an advanced workflow.