It means we cannot use rename column automatically. Of course, I think it’s hard for Liquibase to know when it should drop or add or rename a table/column.
this is exactly the reason why automatic change management does not work. I’ve never seen a tool that is able to distinguish a rename vs. drop and add (works for columns or for tables). This decision can only be made by a real person having extra knowledge about the system using the datamodel and if you provide that context to a tool you are half way of doing it right yourself.