Harbinger does need some more tuning.. i could burn down 4-5 mobs with ease in PvE.
Willbender needs a little more tuning as well it felt underpowered as well, and i went in downstate quite a few times.
Virtuoso was okay i had quite fun it with it, but in WvW or PvP it might have some issues if you count their attacks as projectiles, but i guess you should always have a GS or S/S with you.