I played Ziggs bot last night
And it was fun. I haven't played him in ages so I sucked at hitting people with my Q. But taking towers was just nuts. If Ziggs was a little faster on his feet then he'd be the scariest splitpusher in the game once he gets a Lichbane.
Though the like of an ADC does hurt you. But grabbing an attack speed midlaner or jg (Yasuo, Kindred) could make up for it in teamfights.
IMO I'm glad this is a thing. I hope this opens up some diversity in proplay.