You lack sharpness.

The description is surely accurate, but lacks the dash or sharpness of Origo's own writing.

Much of the milk and dark chocolate used in its confections lacks the richness or sharpness that great chocolate has.

Too little and he is tired and lacks sharpness.

Perhaps the taximan's eyes lacked sharpness; possibly, he did not stare long enough, for The Shadow did give visible token of his progress.

It lacked sharpness of definition.

I think Helen was wonderfully objective, but I do think her style, quite properly in view of her mysticism, lacks sharpness of definition.

For the second straight week, the Eagles lacked sharpness.

They were a step slow defensively, and their offense lacked sharpness.