This is how it goes. You're in a party on a mission/arcade run, at some time one of your allies dies (along with their Emergency Revive) in the heat of battle. Let's say that we want to revive him/her. All you need to do is to click on the portrait and give a spark, right? But we're in the middle of a battle! That simple click can be really fatal if we want to help someone.
Now, we all remember in the past. We could revive an ally by simply getting closer to your teammate and pressing the button. As of today, you need to open up "that" menu, with is a little unconfortable.
What I'm suggesting is not to bring back Health Sharing. But to allow to instantly give a spark to the player by getting closer like the old days, it would make reviving a little simplier, don't ya think?
it would also make wasting sparks on an "inefficent" teammate very possible. the best could be double clicking for confirmation.