EDIT: Ammended Lily's success rate (just a simple way to put it). This I actually have an answer to. Venus Gleam was talented, yes. Her talent came from long years of practice and trial and error. Venus' natural talent however was actually gardening and the the growth of the reagents. Lily is the opposite, while she has a difficult growing the reagents for the store's products and ends up gathering most of them instead, she is naturally adept at the mixing and creation of the blends and remedies themselves. She's been able to strengthen the effects of the outcomes somewhat, little tweaks to recipes here and there, and some ponies have taken notice. You are right, however, in the respect that I may have made the effect too immediate. Hopefully the edit eliminates the feeling of suddenness that the success had before by placing it as a clearly attainable future.