there are so many champs in this game whose abilities out range zileans q which is his only damage ability.
Trading stance.
Im not saying he is bad but he certainly isnt as good as any of the other support champs.
He's average. Not the most flashy Support, but he's doing the job pretty efficiently, his zoning/poke is above average, the permaslow is a very good catching tool and the ult basically doubles the health bar of your carry on top of baiting many players into regrouping for a nice double bomb on ally respawn.
He's super chill to use, you have to wait for the best moment and never overuse your abilities.
If you want a power up, use Manaflow Band and Presence of Mind to take a shortcut in his build by not having to buy mana, the +750 are more than enough and allow you to rush 40% Cdr for an earlier powerspike.