i know there is already Paste multiple tasks or sub-tasks
but my suggestion is a bit different, we often start a project or a task that is used to collect different ideas and sub tasks, if the sub-task is bigger and need more than a bulletpoint or checkbox then you start converting checkboxed entries to sub-tasks or separate Tasks, all by copying and pasting and clicking around, in that process you loose the connection between the entry and the newly created task if you don't go over board and a hell of a lot more clicking and copying and pasting permalinks back to the source.
Why not add a dedicated button in the toolbar that takes the marked text, creates a Task and puts the text in the Title (in case you are in a Project or Folder) or a Subtask (in case you are in a Task), converts the marked text to an interactive link.
In case of a list, multiple tasks could be created and linked. This would also solve the "paste list as tasks" as they could just use a folder/project/task as a container and generate the tasks through this button.