While this isn't anything major in the terms of gameplay, hear me out. Way back when in the early days of the IOs, all "Recipe Found!" prompts showed up in white. Obviously, now white is common, yellow is uncommon, orange is rare, and purple is very rare. But then there's the case of PVP IOs, which are categorized as "rare" in the recipe lists. They are their own pool of special IOs, they can only convert into other PVP IOs.
Basically, what I'm getting at here is that it would be quality of life change to make PVP recipes show up as their own color, such as blue or green. Having the "Recipe found!" prompt show up as a unique color, and then having its color be the same on the recipe list. On top of this, at some point along the way they made a change so you couldn't sell purples to a vendor...Have something like that for pvp recipes as well. On top of it being convenient for everyone, it would also help newer players understand that the recipe they got is different than the others.