Something that occurred to me within the hour, while taking with some people about previous design idea pitches. One thing that came up a lot in relation to one of the changes in a WHM design that I've posted (
here), was that the UI for trying to track DOTs in FFXIV is... quite bad. And the part of my design where I suggest reducing Aero/Dia to 12s duration (so we use it more often and therefore Glare less often), would exacerbate the issue somewhat. The game doesn't show your DOTs on the Emnity List (although starbirds inform me that there's a way to do just that via less-than-TOS-compliant methods), for example. But, the point raised was that if your DOT falls off, it can be difficult to 'notice' and refresh it. If only the DOT was a burst CD instead, so you could see it on your hotbar that it's 'ready', some players would say.
...So, why not do just that? Abilities can 'light up' when a combo is being executed, or when a resource is high enough to use the action (for example, Fan Dance lights up when you have a Feather). So, how about some kind of system change, or a trait, or whatever way to implement it, wherein 'If you have an enemy targeted, and that enemy does not have <DOT name> applied to them by you, the ability 'lights up' on your bar to indicate 'hey, it could be a good idea to use the DOT again''
Is there any reason not to implement this? As far as I can think, it'd help lower end players keep their DOT up, and higher end players who have the fight knowledge to know 'I should ignore the DOT even though it's flashing, because the boss jumps away in 8s and it'd be more efficient to use another use of <filler spell> instead' would be able to, 'ignore the dot even though it's flashing'. Make it optional of course, some people might not like having their DOT yelling at them 'USE ME USE ME'
edit: maybe even make it customizable, so that you can specify that it starts to flash 'at or below X duration', EG you could tell it to start flashing when the DOT is at 3s or less, rather than 'it fell off'