"Because Ekko is extremely toxic?"
Someone got rekt by Triforce ekko.
"without ever going oom"
lol he's melee he's like food to good ranged champions, plus he can run outta mana hella quick with his combo if he misses.
"failsafe"
looks at Talon
"practically ungankable"
THE POWER OF WARDS COMPELS YOU
"overloaded kit"
Not wrong but not hard to get around, he needs the 3 stacks to get you low, it can't delete you, dodging that shield is the easiest thing in the world unless you just can't move and attack, heal doesn't really need to leave, but the damage on his ult does, his Q means jack shit to you as a ranged champ, and a gap closer.
His kit relies on how good Ekko is and how bad his opponent is. Not like anyone can pick him up and just be a master at hitting skillshots.