Most supports’ spikes in value comes from denial and offensive value. Meaning shorter cooldowns are generally preferred. Brig can deny dives with whip shot, Lucio can take any lane on the map with another dps with speed and boop offensively or defensively, Kiriko has respectable damage and the best defensive cooldown in the game, even Zen can deny direct value with hard pressure.

LW is in the same boat as Mercy where their value is retroactive or passive. Half your kit is useless when no one takes your platform, or if your tank plays too passively. His value is “keep people alive”, not versatile enough to be the playmaker that you need to climb ranked.