Ziggs has been trash ever since they destroyed hit Q hit box.
Here's what riot loves to do: They RUIN a champion and make them unplayable for a very long time, then after that champion is essentially forgotten about, they rework the champion.
Then stupid people are like "oh he's so much better now; he really needed this rework"
I think they intentionally do it. I had about 2000 warwick games and they nerfed warwick into the ground, then eventually reworked him. I think it prevents people from being as irritated about reworks.
So all that being said, and that being the pattern riot takes, i expect a ziggs rework eventually rather than just fixing the Q hitbox.