Because what league really needed was another impossibly sticky champion with % health damage.

We only just cured the "Tank Ekko" cancer that plagued top lane. Now we have a champion (Kleb if you haven't figured it out) with stupidly easy, GUARANTEED TO LAND, stickiness with thoughtless abilities that literally DO IT ALL FOR YOU. You have 1 ability that may take some practice. Your Q, and even that is pretty easy. Either a decently ranged cone which also knocks you back or a penetrating Leblanc E which pulls if unbroken. I can already see this champ's build path . Ekko was pretty bad, but at least only his e was point and click for a guaranteed hit.

Towers won't phase him in the slightest while his passive is up which if we're honest, is going to be most of the time. That and the auto eject/drop aggro makes playing safe under tower just as dangerous as in the lane. Pealing for squishies will be very hard with his guaranteed targeting and team movement speed buff. Maybe if this movement speed buff caped for all others to some extent? So that way the full enemy team is not breaking mach 4 with a Sivir, Sona, Karma, Hecarim comp.

While nothing is confirmed to be in the full release, from what the spotlight showed, I see dark times ahead for the back lines of teams.