When creating subtasks from the according section inside an existing task, the subtask will be created in the upper most swimlane, where as usually the appropriate swimlane might be the same as the parent's task one, at least the way we structure our boards.

An option might be, to introduce another subtask related setting equivalent to the one for choosing a list for subtasks from other boards, to choose between:

• same as parent
• swimlane1
• swimlane2
• ...

where the actual swimlanes will be listed underneath the option 'same as parent'.

That might look like: