by Silverdawn » Sun Dec 18, 2011 12:48 am
Unlike shadow stepping, the portal spell creates a ground-based effect that has a duration and can be used by more than just the caster (ArenaNet has said they're currently trying to decide which allies should be able to go through - but other players will, for sure!). Also, it won't take you anywhere you haven't already been.
Besides, Thieves aren't the only ones teleporting. The guardian has a teleporting sword skill and I've seen Elementalists use an air skill to teleport as well. In GW1, Necromancers had some teleportation skills. I don't know if they have any in GW2, but I wouldn't be surprised if they did.
Long story short, I don't think portal will step on the Thief's archetype as the king of mobility.