Kindred's E Quality of Life Change (Indicator when the ability will crit)

I've just watched Evelynn's Champion Spotlight and I noticed something nice she has: An indicator when the enemy is low enough to receive bonus damage from her Ultimate.

I think it would be nice if Kindred had something like that on their E since it crits whenever the target is below certain HP threshold (starting from 15%). Currently it's pretty hard to guess whether or not it's good time to proc it or maybe wait for our allies to do a bit more damage to that target. It should be clear IMO.

What do you guys think?