edit: So yeah... I was looking at a side-by-side comparison of a staff and dagger of equal level and rarity (common, 12) at 5:40 in this video: https://www.youtube....h?v=1_w_hnt9TH4
Acolyte Ice Staff [requires lvl 1] - 32 dam, 52 dps, + 28% Barrier, empty rune slot
Masterwork Stiletto [requires lvl 2] - 70 dam, 180 dps, + 3% Critical Chance, +8% Critical Bonus, +20% damage if not hit for 5 seconds, empty grip, and empty rune slot
I found this to be a bit shocking, since this is only one of the rogue's weapons, and the second would add even more bonuses from rune slots and custom components. However, I looked around a bit and found a one handed mace to compare with...
Firm Kirkwaller Warhammer (common, lvl 14) [requires level 11 (???)] - 71 dam, 104 dps, +13% Guard damage, empty hit, empty rune slot
Now, compare that with a KE weapon generated by the Ice Staff...
Spirit Blade [requires lvl 1] - 96 spirit damage, +200% dam vs. Barrier, +400% dam vs. Guard, eldritch detonator, can be upgraded to deflect projectiles
When compared to the one handed mace, that sounds pretty solid despite the fact that it costs 10 mana per attack... I don't know how well that will scale, but the 69 damage staff would generate a 207 damage Spirit Blade, so that might be good enough. Not as powerful as a maul, but it bypasses armor and has other properties that should make it worthwhile... not that I have a problem with two handed weapons being powerful, since they seemed a bit weak in DA2. It's just that the staff damage numbers looked kind of too low when compared to other weapons. Even bows do almost double damage, but it's hard to say how any of this will look once armor, elemental resistance, and elemental weakness come into play...
My only concern now is the relatively low damage of spells, but I guess that's a separate issue...
edit: One last thing... there is a KE passive near the bottom left of the tree that shows a Spirit Blade inside a shield. Could this add additional armor piercing to the weapon? It looks like it will buff Spirit Blade in some way, whatever it does, so that's something to look forward to as well...