Aliases are a really powerful tool, particularly when you have multiple environments (EG Test, Prod) and need a published workflow to work without any code changes (In particular in an IT or Release/Change Control model). By configuring a system alias on your Test and Prod servers, code will dynamically point to the correct server.
However, aliases can be somewhat cumbersome if you have a lot of databases on a server, and those database names change by environment. Effectively, you end up needing an alias for each Database, which runs into naming convention and standardization issues.
Having the ability to configure a "database value" or a "database alias" would do a lot to help this. This could either be a file that would be attached (allowing for easy config changes without risk of modifying the underlying code structure) or a secondary tier of aliases, so that a connection string might go from:
aka:SQLSERVER (contains sqlserver and database information)
to:
aka:SQLSERVER||aka:database - so that at runtime Alteryx would evaluate the SQLSERVER alias and the database alias to create the correct connection string for that environment.