If you don't like DRK, you don't have to play it.

AoE in 5.0 looks interesting, something like:
  1. Abyssal Drain + Salted Earth + Carve and Spit + Living Shadow (weave in when possible)
  2. Flood > Unleash > Blood Weapon -> Stalwart Soul > Flood > Unleash > Flood > Stalwart Soul > Flood > Unleash > Stalwart Soul -> Flood
  3. Delirium > Quietus > Quietus > Quietus > Quietus > Quietus > Quietus -> Abyssal Drain?
  4. Unleash > Stalwart Soul > Unleash > Stalwart Soul > Flood > Unleash > Stalwart Soul > Unleash > Stalwart Soul > Unleash > Stalwart Soul
  5. Quietus > Quietus -> Abyssal Drain?
  6. Unleash > Blood Weapon > Stalwart Soul > Unleash > Stalwart Soul > Unleash > Stalwart Soul
  7. Quietus
  8. Unleash > Flood > Stalwart Soul > Flood > Unleash > Flood > Stalwart Soul
  9. Unleash > Salted Earth > Stalwart Soul > Flood > Repeat from Delirium.
If your AoE enemies aren't dead long before it gets this far, then that's impressive.

While it can be summarised as using oGCDs including Flood of Shadow whenever they are up, using the gauge and Delirium on Quietus when available, and otherwise spamming Unleash -> Stalwart Soul, the point is that it seems deliberately inconsistent unlike PLD because of factors like Delirium and Blood Weapon having different cooldown times.

It will be challenging to use TBN if you just bust all your MP on DPS right away, so it'll be on you to only use enough to keep MP from capping and keep Darkside up.

Keeping up Darkside will become challenging if you intend to use TBN (you will have to use it correctly and not let it expire). A few TBNs expiring without mitigating anything instead of Shadow being used will mean Darkside inevitably expiring.

DRK has all the cooldowns it needs, so Dark Mind is just a for-fun buff. It's part of your role to try and identify when an enemy uses magic, and use Dark Mind for it. If you bother with this, you get to save a generic cooldown for later.

It looks more well thought out than everyone thinks.