Yoshi-P: "If you want more engaging content, go play Ultimate"

[ForsakenRoe]

I might even argue for a shorter dot duration, up to 15s max. Seeing how the average human attention span is on a steady decline, any dot outside of 3 gcd's worth of filler may be completely forgotten.

WHM: Aero>Dia series at 12s
SCH: Bio series at 30s, Miasma series at 24s (with a cast time), Shadowflare ground AOE at 15s
AST: None, by deleting Combust to make room for a properly fleshed out card system
SGE: E.Dosis at 30s, same as it is now

..is how I'd do it. At least, in very simplified terms, there's more changes that I'd do alongside those to adjust level-up skill acquisition pacing, potency upgrade timings, traits to allow certain 'useless' skills to be consolidated and make better use of hotbar space, etc.

In my dream UI I'd be able to see my dots, and any and EVERY single debuff on the boss.

I've heard there's a non-TOS compliant method to having your DOTs, and ONLY your DOTs, show up next to each enemy in the Emnity List (the little thing with the coloured shapes to show your aggro on each mob). Sure would be nice if SE were to get angry about people using that on stream, and add it to the game in the very next patch, hint hint