Improved Critical

I am sure that I am not the only one that has noticed this.

When you have the Improved Critical feature on your character and use the dice to roll, your dice number isn't doubled when you roll a 19.

Since the new critical is 19 and 20 it should double the dice on both numbers, but I'm guessing that the feature hasn't been implemented yet.

'Smart' dice rolls haven't yet been implemented yet, you're right. However you can manually roll critical hit damage if you right click/long press the damage button and select 'Critical Hit'