Personally, I think many people don't realize how much recourses affect DRK.

We have 2 windows, burst window (Delirium) and build recourses window (Blood Weapon).

Our combo gives us 2 resources, MP and Blood Gauge.
If you're not keeping uptime on target, you will be losing not 1 but 2 recourses.

Blood Weapon window is tighter than Delirium window, and is more punishing (Haven't seen people brining this up).
Blood Weapon gives you (again) 2 resources, MP and Blood Gauge.

Your goal is to maximize MP and Blood Gauge gain under Blood Weapon. If you cannot do that, you get less MP and less Blood Gauge. Which will lead to feeling that you're not generating enough recourse to press more buttons.

The reason DRK needs to meld Skill Speed is not for Delirium like many seem to think, it's for Blood Weapon.

If all what you have been doing is focusing on is Delirium and ignoring Blood Weapon (Not trying to max it's gain) You're losing a lot of recourses.

Not maxing out Blood Weapon gain --> Less MP & Blood Gauge --> Less Edge/Flood of Shadow & Less Bloodspiller/Quietus.
Which will make the job seem slow.

In order to max Blood Weapon gain, you need to fit 5 GCDs under it. Depending on your ping, you need to meld Skill speed until you're cabable of doing that.

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From what I understand, people want generating recourses to be much easier than it is now (At the moment our source generating window is very tight).
I can agree to that. But disagree about reworking DRK entire kit. It is fun to play when you max out your recourses.