Here's my initial list:
- Ability to cross link between Series. For example, when someone completes a series, be able to send them to another series.
- Ability to use links/buttons in a message to branch to multiple next outcomes. For example, if user clicks button A they go to tour A; if they click B they go to tour B.
- Ability to create tags that are assigned to users based on specific actions within a message (i.e., not just "clicked a link" but according to which link they clicked.