I mean...once transmog is out and doesn't need style materials, style materials will be DEAD on the market, and quite prossibly mimic stones.
I believe in order to have a healthy market & not letting an in game system dies, one style material (with the exception of crown exclusive motifs and imperial/morag tong transmog) should be required per piece when you do transmog (and you can use mimic stone instead) , and in exchange the gold requirement should be half.
Think about this
@ZOS, no style material needed -> style materials become useless -> style material becomes so low price on market -> no more mimic stone purchase -> since no one need them so no one keep them -> less need on storage to store them -> less need for craft bag -> less subs. (probably a bit over exggeration on last two..but style materials do take up many space to store for anyone who want to keep them)
For ppl ranting about how I want ZOS to "charge" more, understand that you always have the option to go get style material with gold and quite possibly those mats don't even cost as much as the gold on PTS, this would only affect those who don't mind purchasing mimic stones to reduce the time/gold cost, and is a part of "healthy" income ZOS could get to keep ESO funded