I'll just skip right to the main reasons why Moors Captain gear has been tailored for PvE.
It really comes straight from the the set bonus's. Stat wise you won't find these sets to be as satisfying as the ToO set, but in all actuality, the bonus's end up being the larger modifier.
Lets break the two sets down that I use to PvE:
First one: Perseverance Set. Here's a look at the bonus's.
If you notice, I have the 3 set bonus that gives -20% Defeat Event skills Cooldowns. This essentially translates into all of your defeat response skills cds dropping by -20%. The reason why this is important in pve, is because you can utilize your rallying cry 2.5x more than if you didn't have this set bonus. So, instead of a 15s Rallying Cry (with legacy), you actually end up with a Rallying Cry (with legacy) looking like this :
So from 15s to 6s. This basically means anytime you get a defeat response you will be able to use a rallying cry since your defeat response last for 8s.
Now, for the 2nd 3 piece set:
As you'll notice, I once again have the 3 peice set equipped. It's not about the stats, its all about the set bonus you get. The -25% Escape from Darkness Cooldown is really what you are aiming for. This 3 piece set essentially makes the captain have....by far, the best in combat res in the game. I'll show you why. If you trait for Escape from Darkness (blue line), and you have the legacy on your emblem, your Escape from Darkness will look like this.
What you should be looking at is the Cooldown for Escape from Darkness. Notice that this 10m TRAITED skill becomes 2m30s! That is by far the best in combat res in the game.
If you want 6s Rallying Cry, and 2m30s Escape from Darkness, you need to invest the time to acquire both 3 piece sets from the moors on your cappy. It does wonders in pve.