Information on the possible hero picks.
impact for my app: low
What is your current pain point?
The possible heroes you can pick after you started an arena run is not part of the Hearthstone logs hence image recognition is required if only using log files.
What do you have in mind to solve it?
Maybe this information is available when reading DraftDisplay. s_instance / m_choices.
If this not easy then I will go with image recognition.