Wouldn't Kog's passive be more suited to Ziggs?

Ziggs is playing with bombs all day so having a loose bomb explode when he dies would make sense. I'm not sure why Kog blows up into smithereens upon dying. Of course, Ziggs' current passive is way better than Kog's so I'm not advocating replacing it but maybe it can be an additional thing. What I'd like is for there to be a fiery area for a few seconds around his body after he dies. If someone steps on it, it deals something like 25% of Ziggs' AP over 3 seconds.

I still think Ziggs needs a little something and his winrate (especially late game) reflects this. The double damage on minions from ult. was huge for him. I think adding 10 more units on his Q explosion radius would maybe already be enough to make him decent.