Kog'Maw Passive update???
Kog'maws passive doesn't really work as well as it used to, with most adcs having some escape (dash or increased movement) and assassins being able to take him down quickly with relatively no problem it is very hard to use the passive. Because he has increased range and he is a glass carry he doesn't want to be near the enemy anyway. Maybe instead of the passive being timed he could just be able to reactivate an ability... like sion.... and blow himself up, that way it makes is harder for assassins just to drop in on him and kill him.