Changing the defaults takes 2 minutes in Rails. What's the problem? Besides, there are gems like Rails Composer [1], which allow you to create new projects based on a template.
[1] - https://github.com/RailsApps/rails-composer/#your-options
[1] - https://github.com/RailsApps/rails-composer/#your-options
You can tell Padrino what you want during the creation of a new project.
You can tell Rails what you want immediately after the creation of a new project. Rails simply saves you time by having sane defaults. Convention over configuration at its best.