When you add a new Import/Export for tickets, it would be great if only activated options are seen.
E.g. "Responsible" should not be shown at all, when the System Configuration setting "Ticket::Responsible" is activated.
Ticket::Responsible is not activated:

In Step 2 you can see the field "Default responsible"

In Step 4 you have the possibility to select the responsible or its ID as a possible column:

Also it would be great in Step 2, if the article options are only appear if the checkbox "Import/Export articles" is checked (and maybe a new order of the fields would make sense for a better understanding)