Tahm Kench devour execution

After playing with tahm kench, I found it very weird that, as a devourer, killing an enemy champion with devour still requires you to spit them out for the lethal damage. While it would be quite a pain to recode the skill just for a visual aesthetic, I think it would make more sense and feel a lot more rewarding to kill someone with devour if, as the move suggests, final blows devour them. Thoughts?