[GAMEPLAY] Amumu's E, Sion's W, Overgrowth

In the patch 8.16 it's mentioned that 's E gets new damage reduction scaling, but in game it's not visible. (pic. 1, 2)

Also in the patch 8.16 's W shows that he gets 4 hp per unit killed, but when you activate the shield it shows 3 hp per unit killed (the hp isn't interrupted, only text has to be updated). (pic. 3, 4, 5)

And now Overgrowth, when you are jungling and you have overgrowth killing for example Grump, it counts as 4 minions, but overgrowth sees it as 1 minion killed, should it be working like that? I know that overgrowth came when jungle monsters were counted as 1 minion, but when the monsters were updated wouldn't it be logical to update the overgrowth too?