Provide the ability to define a Release Notes template
Someone suggested providing an Octopus Deploy "built-in" variable for storing release notes (see here).
While this is a good idea, I feel it would be even better to just be able to define a template for release notes, which itself can contain other variables and/or be populated by a variable or script or whatnot (imagine, running something like git-release-pull to "auto-generate" your release notes based off of merge commits to master, for example).
In my case, I'd like to be able to prompt for a TFS Build URL and the web server URL for accessing the newly deployed release. (In my case, our "first-level" releases are released to on-demand environments for testing--so each release could be deployed to a different machine and testers would need to know where to access the newly deployed application.)