Switching to an application that is minimized using Command-Tab does not open the application's window if it is minimized, only if the app is hidden.
I'd like to suggest an option in BTT to either:
a) Allow the yellow minimize button to be configurable to 'Hide' as if you did a Command-H
b) Modify the Application Switcher to open minimized applications without having to hold down the Option key. Basically the exact same way Microsoft Windows does it.