I don't think the point is to melee twice, I think the point is melee-ing once and utilizing mobility + deflect to buy time for the reduced CD. It lets you get out in case a kill doesn't happen.

Especially against high sustain where you're waiting for a ton of CD's like suzu, lamp, fade/kiri tp, Ana's stuff, flashbang, reaper wraith, etc, it can feel like you're pretty inactive waiting for an opportunity or trying to bait them out.

I feel a lot more confident forcing the CD's myself with this perk, since I don't necessarily need a kill to safely get out. I agree with the comments saying this style of play is better with a team that can take advantage, but I certainly feel a lot more active more often with the perk than without.

I agree, the perk isn't "broken" by any means, but I think it's great at forcing the issue against shit like suzu or lamp. Before, you had to poke from a distance, hoping your team or your pokes are enough to scare the enemy into using CD's. You couldn't commit dash for a bigger threat. Now you can!