I've been working on a study of Skill Speed. figuring out progression for each level. There are a number of points to be made from this.

Skill Speed is the one stat we can see effect in the game.
What I have observed is with each level. the ungeared base has increased by 1 point.
The next point is this. The base stat is not the starting point. It is not Zero. For skill speed, I was able to determine the first point of shift.
based on the first shift, I can find the second shift.

lvl 70
Base: 364
1st Shift: 381
2nd Shift: 448
.01s = 67 after 381

GCD = 2.50 - rounddown((((SKS-381)/0.01)+0.01);2)

my theory is that everything else uses a similar formula. so 1% would occur at 381 stat level. and every 67 points would be another 1%. so each point is equal to 0.014925373134284~% with a 1377 critical hit, I should have a 14.88% critical hit chance. This is against a target at level 70. targets above or below level 70 alter these percent.

percent = (((STAT - 381)*(0.01/67) +0.01)*100

I'm not sure on DET, as it starts at a lower base.

The only thing I know that is wrong is that 364 is not zero. 314 is zero.