Whoever did the Roll20 Deep Cuts implementation ... thank you very much! But there is one little thing missing; when rolling with 0 dice and adding bonus dice, only the bonus dice are rolled, instead of 2d6 pick the lowest + bonus dice.
Per default that is true, indeed I forgot to mention that I'm talking about a special case.
When you get bonus die through help or abilities you would just roll 1 dice instead of 2 keep the lowest. But when you get bonus die because of additional threats, you would have to roll 2 keep the lowest to generate one outcome and rate the bonus die seperately to allocate to the threats.