As an almost exclusively scepter/torch using guardian (I do have a 2h sword but it’s more of a back up weapon than anything), I personally think they’re fine in PvE.
In WvWvW the only thing I would really change is projectile speed.
The class is fine(ish, Mes’ seem to ruin my day), you just have to work a little harder than most because you need to skirt the frontlines of the zergs and often, will get picked off if you’re not careful about positioning.
That should be okay though, for two reasons;
A) You should have a decent amount of survivability as a Guardie.
B) You will often find yourself being able to bait enemies into your team.
I’ve not done much sPvP yet I must admit, so I can’t comment there, but right now it feels okay, abilities wise, just the projectile speed makes you feel a bit like abilities are the only things you can do anything with. Even the travel time on the torches double-tap fire attack (Zealot’s Flame) is a bit crappy, but yea, it’s literally my only gripe.