The way RoM is built, that GW2 mechanic would not work here.
In GW2, you still have to aim at whatever you're fighting, and mobs/players have to aim at you as well. Thus, being able to roll to the side to dodge skills actually works. Skills work like real projectiles and can miss a target. Here, running off to the side won't stop an attack from hitting you, unless it's a casted, area-restricted AoE from a boss. In which case, you shouldn't be in the AoE range anyway if you can't survive it. Projectiles here auto-hone to you, they're not directional like in that game.
I agree that the more fast-paced type of gameplay is more fun, for me personally, but RoM won't work like that, nor should it. The entire gameplay mechanic would have to be rewritten, and there's no point in turning a game into something it's never been just to copy a popular MMO.