Context behind current Ziggs changes on PBE?? (question to balance team)

11/23 PBE Update
Warning: PBE Content is tentative and iterative - what you see may not reflect what eventually gets pushed to live servers! Manage your expectations accordingly. )
So, {{champion:115}} Ziggs is my favorite champion and as a Ziggs player, I would like to ask out of curiosity to anyone on the balance team on why they choose these specific changes to Ziggs and what other changes could you guys possibly explore for him if you felt like he needed more loving?
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