rogues are not aoe at all. they/we have like 2 aoe abilities, and they suck. Rogues are single target dps machines.
Str is mathematically superior to dex. They kind of screwed that one up. the game says dex is primary at the start, the game gives dex priority in the ability roll. but the actual stat priority in game is STR>>>cha>dex/int
Even with crit severity, etc.
The issue is str damage bonus only comes from str and disc of str feat. so you are talking about a range of +4% to 16% damage that can only come from this source. this damage is multiplicative with all other sources. Its a flat 4-16% damage gain.
Dex gives crit on the other hand. And so does crit rating, and about 3 different feats, and a class power, and some skills have higher crit chance.
Lashing blade has 100% crit chance in stealth. you get +10% crit in stealth on a few skills in exec. there is 8% crit from feats in base and exec, 3% crit in class powers. +crit buffs.
so for dex that 4-16%, is adding into your 30-60% crit chance pool, there for is not remotely a true 4-16% damage gain.
Power vs crit rating.
this one is a bit more complicated.
Power is a flat value. Im not 100% if it scales with level yet. But, at each level its flat. 1 power=.04 damage. 100 power gives 4 damage/healing. 1000 power gives 40 damage. Which is then of course altered by skill coeffs.
now, taken at face value that sounds kindof terrible. Especially at high level. your daggers deal 1000 damage, and 1000 power is just adding 40... 1040 damage. yeah..
So I think that is how its balanced. power is linear, but its effectively "curved" in relation to your weapons. at level 10, your daggers deal 40 damage. so 100 power giving 4 damage, is a good 10%. while at level 40, your daggers deal 400, and that 1000 power for 40 damage is needed to give 10%. Thus you need more and more power to increase your damage in relation to your weapons.
the effect hower, at low levels power is powerful. but as your weapon damage scales up, faster then your power likely, crit is scaling as a % of your weapon damage, and thus becomes more useful, until you hit the soft cap.
Crit is a curve.
Threw out my notes, but at 54. I had something like 200 crit rating giving .0087% crit chance per point. 500 giving .0083% crit chance per point. 1000 giving .0079% crit chance per point, etc.