So the Base Crit Dmg is 50% and with the NB passive Hemorrhage which gives 10% more Crit Dmg I only get 55% Crit Dmg. However this bug have been know for a really long time now so I don't know why it never gets fixed.
But to move on to more new stuffs. The Champion Point passive "Elfborn"
I have played around some with different values here. And it it seems that 30 point in Elfborn (10,8% more Crit Dmg/healing Crit Dmg) only give around 5% more critical damage. 10 points in Elfborn (5% Crit Dmg) only give around 1,9% Crit Dmg. I have tested the Crit Dmg on a lot of different mobs of different levels and the results are always the same.
Now I don't have any screen shots to show for, but anyone with a damage indicator can calculate their Crit Dmg and see for them self that Elfborn and Hemorrhage does not work as intended.
I also heard from multiple sources that some people start to get less Crit heal dmg the more points they spend in Elfborn.