Execute Indicators- Should They Be More Present?

Anyone else feel like ultimates that deal more damage with the enemy's missing health or ultimates that rely on getting the kill in order to activate a secondary effect that is a large part of the ultimate should have execute indicators? I'm looking at:

(Jhin's execute is on a "per bullet basis" with the execute indicator appearing when his current bullet from Curtain Call will kill them) (Mordekaiser's will appear if his ultimate will kill it's target without any interference from outside in a similar style to Zed's ultimate shuriken indicator)

Nothing feels worse than playing as some of these champions, whole-heartedly believing your long cool down ultimate will kill the target, and then they survive with health in the double digits. It's just a little frustrating, especially since Garen, Zed, and Cho'Gath already have execute indicators. Now, I can alrrady see this comment coming:

WTF, no. These champions don't need to be more brainless than they already are. Get gud low ELO scrub.

No, this isn't something that has anything to do with balance or anything like that. This is an issue of consistency and maybe even clarity.