I'm a winner! (= After you get used to just look at where you going and leash the entity game become a breeze. (=
I think going through the walls if you do not look on them is unnecacary. And also it is strage that entity is not going through walls - pathfinding for sometimes stops it completely and you need to rescue it.
Probably it is a good idea to add a clue where center is after weakining the entity. Like an arrow or pointer.