It is hard to speculate about this because although I could tell you theoretically what it is supposed to do, I am a man of science and there are no studies either way on the matter since most of the studies focused on the aromatase inhibitory properties as well as anti-cancer benefits. The fact that it contains steroidal skeletons though says there should be something in there that binds with some affinity to the AR but to what extent is anyone's guess.
As for cortisol I am not a fan of affecting cortisol at all. Although it may be beneficial in the short run you can cause fairly severe adrenal suppression or overregulation by messing with this system. For instance there was a study done a while ago on stress dose hydrocortisone used in TBI to prevent VAP. In the study they quote that the use of hydrocortisone even below stress dose in a healthy person and taken for 2-4 weeks can suppress adrenal function thereafter for up to a year. So although in the short term this may be a good thing you can drastically affect your bodies ability to fight inflammation and properly function. The adrenal system is one of the most delicate, mainly in the way of the corticosteroids not as much the catecholamines. One of the reasons people progress through sepsis in the hospitals is the inability of the body to overcome inflammation and the SIRS, hence in later stages we give stress dose hydrocortisone.
This is just my opinion of course and I tend to stay on the safe side. Bottom line is I am not sure of whether it has any cortisol reducing properties but be careful of things that purely suppress cortisol as it is very useful believe it or not, just not in extremely high amounts for long periods.
(week by week noticed effects, strength gains, etc) 
