Is there a quicker/easier way to change the assignment location if someone has entered it incorrectly? Is the only way to reassign it and change on capture, then resubmit it?

You can change the assignment location on Manager. You will still need to reopen the Assignment, but then, once it’s in the Assigned status, it is possible to edit the location.

If the Assignment is In Progress/Complete/Cancelled/Declined, you will need to change it to Open or Assigned.