Use 'superficiality' to suggest negligence or lack of effort, not just a simple approach. The superficiality of his essay suggested he hadn't researched the topic well.
Pro Tip 2/3
Lack of Depth
Describe something lacking depth in knowledge, detail, or thought as having 'superficiality'. The superficiality of her analysis led to incorrect conclusions.
Pro Tip 3/3
Not Always Negative
'Superficiality' can describe efficient, non-complex tasks that don't require depth. Sometimes superficiality is sufficient for a task that's straightforward.