Then they should've used the shape (triangle vs square).
I have to say that in WoW, I no longer even know what warning is from a boss-mod and what isn't.
I know that they introduced flashing screens and stuff like that by default now.
But having a addon reminding you to kick something or to spread out or to do X or to do Y like in WoW is basically doing the "job" of a raidlead now.
In my opinion, addons are basically reminders and "wake you up". But that's also what mechanics are all about anyway most of the time as the mechanics themselves aren't hard to execute, you just have to remember what to do.
In FFXIV, it would complete kill the encounter if you have Archimonde type of Arrows telling you where to move to, especially since a lot of mechanics are designed around adding some things together in your head, and after doing so, you know where you have to be.
An addon telling you that? That would mean the only way you could wipe is by doing nothing.
In WoW, especially now in Shadowlands, I've been unable to see "hostile pools" upon "friendly pools" more often than I count. Both the Nightfae and Kyrian Hunter ability is so fucked up in that regard.
With nightfae, you have a small pool inside your big pool which grants you a "bloodlust", both are darkish blue and the area is a little darker.
If I cast my stuff directly on the Gladiator boss in Theater of Pain, it overlaps 100% accurately with his AoE-circle. It's nuts.
The game has become a complete mess visually imho and I started to *need* addons.