i accidentally salvaged primals a lot of times, and even when i did that i dont regret or cry about it, that only means that i would never use that item anyway so yay 15 souls. plus i salvage a lot of items unidentified because i know what items i could use and upgrade or not, so i guess i salvaged a lot more primals than i know and i'm ok with it. if it was an item worth looking at, then you will look at it, see its primal and wont accidentally salvage it. accidentally salvaging primal fulminators or grandfathers will not hurt you or your progress.
so no, we dont need extra stars or rainbow sparkles on items to differentiate their rarity, they are good as it is, colorblind mode on the other side, then i guess yes.