I Think I know why they made Ekko so strong

Guys I legitimately think the insane amount of damage Ekko does is just Riot overreactiing to the death defying tanks of the current meta, and that he's their way of "fixing" it. Once they realize that the meta is fairly healthy, and that Ekko is legit way too strong for a super mobile mage, they'll hotfix him into control.

TL;DR: Ekko is so OP basically because Riot thought everyone way only tanks always this meta, and wanted him to feel "bursty". But he #reks non tanks too hard and will be fixed soon