Yorick and Zilean's ults and team communication
Yorick and Zilean have ults that could POTENTIALLY be very good and gamechanging. The problem is that 90% of the time, a player doesn't realize they have the ult on them. In the middle of the huge furball, they see their health running low and they disengage automatically, not realizing till later that they had the ult on them that would revive them due to not being able to see it. Usually players don't know they had it till the Yorick or Zilean player yells at them in chat for running away.
The fact is that even the effects we have now, which are glowing and pulsating, are lost a teamfight because people are not looking at themselves. They are looking at the enemy or their own team, but only glance at themselves once in a while. As a result, these ults end up being horribly lackluster due to communication issues, since we do not have voice communication. Either we need voice coms or these ults need to do something EXTREMELY prominent on the screen of the player they are cast on in order to let them know. Floating chalices or a ground target that can get lost in other effects and auras are just not good enough.
Let's look at a champion with a similar ability who does not have this issue: Kayle. Why does Kayle's ult not suffer from this issue nearly as much? Kayle's ult has two things going for it. First, it creates a huge yellow bubble over everything that looks like nothing else in the game. The only thing that comes close is an active banshee's veil, but the glowing gold bubble is impossible to miss. Second, players notice because their health stops moving. They know they are getting hit but the bar is frozen, so this immediately clues them in that they have the ult. On the other side we have Mordekaiser, who's ult gives you a very prominent audio cue and again has a completely unique and unmistakable visual.
What Yorick and Zilean need are more prominent indicators that can't get lost in the shuffle. An audio cue would be nice too. Without these, these two champs are limited to ulting themselves or in Yorick's case ulting the ADC and pushing towers as the only reliable ways to use their ults. Without voice chat, the effects are the only way for Zilean and Yorick players to communicate the ult, and the current effects do not cut it.