Ages ago, back in DaoC when people were putting together groups it was important to get a set of components. You had to get endurance regen. You had to get healing. You had to get CC. But the main thing that you could absolutely not leave the mile gate without... speed.
Speed lets you choose your engagements, lets you minimize the prep window of time that your targets have to ready for an attack, and it allows you to evac if needed.
Well Guild Wars 2 has gone a ways to simplify things. Healing, crowd control, they're spread across most of the classes in some form or another. Yet the concept of speed I haven't seen discussed much in the various forums of the game. It's been mentioned partially in SPvP, but its importance in WvW hasn't been covered.
I believe it is going to be very important for there to be a good chunk of the population to be specced primarily for providing speed to their people around them. One for every 1-2 groups I believe, depending on how various abilities work together.
Well how can this be accomplished? Actually fairly simply.
Each class has different abilities that can provide swiftness, for a listing of them go here.
But the best way, I feel, will be to get the Rune of the Centaur. The six piece bonus for Rune of the Centaur makes it so whenever you use a heal ability you give yourself and nearby allies Swiftness for 10 seconds. Then combine that Rune of the Centaur and then spec into the +boon trait line for +30% duration. That makes the buff 13 seconds. Combine this ideally with a heal ability that has a 15-20 second cool down and you can have speed majority of the time. Then equip your other speed ability to use when the centaur buff drops.
For example, a Warrior with a Warhorn and Rune of the Centaur can have swiftness up 100% of the time if he uses Mending as his heal ability which is on a 20 second timer. He would not even have to spec into the boon duration.
A thief can just use Rune of the Centaur and Withdraw, and with some creative twisting/hotkeying can provide speed to his group without any other spec/ability impact.
Food for thought.