Should note, since WOW's UI was brought up (and how people used addons to help track DOTs), the DF rework to the UI helps track your DOTs a lot better. They appear on the 'nameplate' for each enemy that you're fighting, and as of god knows which expansion at this point, they have what is known as the 'pandemic window', named after Pandemic, an Aff Lock skill. Basically, you can refresh a DOT early and it'll add the remaining duration to the refresh, up to a maximum of 1/3 of the original duration (so a 30s DOT can be refreshed at up to 10s early, and it'd go up to 40s), allowing some flexibility in when to refresh the DOTs (ie, if you need to move 6s before the DOTs fall off, you can use the DOT refresh as your mobility casts)

If there's a plugin that allows FF14 players to have their DOTs appear on the emnity tracker list thingy, as I tried to show in that pic, then I hope SE implements something similar soon. Since, y'know, they seem to be adding a lot of plugin-made solutions for things that were previously described as being 'impossible'. Like 'have I obtained this orch roll yet' details in the tooltip. Or damage types for flying text when you get hit. Or timers appearing on the party list so you can track debuffs (imagine trying to do P10S daemoniac bonds if you can't tell whether it's Role>Spread or Spread>Role). Be nice if they could add chat bubbles hint hint