In my opinion both sides are correct.
Guildwars2 armory will help people to improve their builds.I dont think that if you copy other people’s build at full point will help you,but i believe that if you can take a look at their build ,any time you want, will help you to improve your own.
The skill will still making the diference!
By the way i support “guildwars2 armory”feature
But on the other side,some people (not me) believe tha this feature will ruin the uniqueness of each character in tyria!