Can we talk about ults that give an indicator that shows they kill

So I've been watching some people play the new Evelynn on PBE and from the looks of things, she has an indicator pop up over people letting her know they will die from her ult. I think this is ridiculous, riot is taking the skill and the idea of learning a champion out of the scenario. I understand there is more to her than her ult, but if anyone can play her and not worry about learning the kill potential for her ult than it takes away an aspect of mastering her. Like Darius (I Know he is very annoying, but play along for the point of the argument) has an execute kill, but it won't tell you if it will kill. It's up to the players discretion whether or not they feel the ult does enough damage. And that goes for a lot of champs that have similar execute ults; Yasuo, Veigar, Jinx, Jhin, Lux etc. Obviously some of their ults aren't meant to only execute but they are most of the time used for the final blow.

And Evelynn isn't the first, Cho'Gath and Garen both have ults that execute with true damage, that tell the player when their ult will kill. Is it so hard for riot to make it so it takes some idea of the champ to get a feel for their damage and when is the right time to ult without giving the player a indicator? I know Garens is different. If I'm not mistaken he only gets the indicator on his villain, and obviously only true damage, but for two champs that are really quite easy to understand, give them something players have to work on.

I feel that for a game that is supposed to revolve around skill and the idea of "if you master your champ you will succeed" I don't understand them giving such powerful moves that are so easy to use, in regards to not only having a guarantee of when it will kill, but they are point and click moves. At least, you can flash the Evelynn ult, however, it can also kill multiple people. However, this is not a post on Evelynn balance issues. All I want to do is see if people think ults should give indicators to announce they will kill.