Yoricks Q Ghoul Damage Scaling

Yoricks Spectral Ghoul's passive of gaining extra damage per hit is nonexistant this patch, level four i know that it gives + 16, at first i thought the enemy just had so much armor, until i used it on a creep, then on all four-five attacks it did the same damage rather than gaining the scaling, And as for the movement speed on the tool tip, i believe it's unclear unless the ghoul also gains the movement speed per hit which i doubt.