Legends should call out their ults.
So far so good for Apex and the UI along with the amounts of pings available, however, given all that I feel Apex still lacks the ability to let their teammates know when their ult is ready.
As a follower and leader myself, I find it very stressful when a teammate has Ziplines, Jump-pads, Portals, ect available but don't call it out thus never using it since most people forget or wait for a "moment" before using it. Thus I either tell them to place it in x spot or just remind them so they know. (this issue mainly occurs for me in Ranked as I want to utilize everything my team has to our advantage.)
I think a good way to solve this issue is through voice lines saying something along, "Zipline ready!", "EMP good to go", "Ready to call a supply drop", ya know, so teammates can prepare for it and or give orders to teammates who prefer to follow.