I agree that Ana needs this voiceline badly. After Mercy’s had it for so long, Ana is the first one that should’ve gotten it as well.
A side note, I KNOW that Zen says “I require aid” but I keep HEARING “I require AIM”. Yes buddy. I do. I know I do. No need to rub it in.
Tbh, I get why these voicelines are in game and I agree that it’s useful for all the healers to have them. It helps the entire team realise their healer is under attack and (hopefully) react. In a game where most people don’t really communicate much despite all the options to do so, this is a decent addition.