Your teem was able to determine that there seems to be a general consensus amongst Humans that Root Beer has a desirable taste. However, it seems other species such as the Ferengi, do not share in this.
Final outcome: Breakthrough!
Your team was able to determine that Root Beer flavor seems to have had similarities with pharmaceuticals in various Human cultures. Ferengi don't seam to have such connections and yet still generally dislike its taste. However, there are some even within their society that have taken a liking to it. This evidence is inconclusive but Root Beer doesn't seam to pose any major threat.