Yes I know Corki is strong maybe way too strong.
But if you think about it, Corki is probably the only real source of magic damage.
Maw doesn't really counters him since he can do as much AD damage aswell as AP.
Seeing people picking Zed vs Corki in LCS prove another point in which they really want to shutdown Corki.
In a Meta where 2 item makes Mage completely useless, I think Corki should not be nerfed for the reason that a Team absolutly need some form of magic damage.