I still don't understand why people bother with rivens. Riven RNG is completely wrong for this game. It wouldn't be a problem if we as players had some way of locking a stat and in doing so it restricts it being traded.
Its disheartening to spend time rolling a riven only to have its disposition get changed because of a meta shift or just popularity. Or the fact you can roll 50+ times and never get a good roll and then see someone in trade chat with a "groll" on it being unveiled.
The Riven sliver things, don't know what they are called since I'm on console and wont see them for awhile, would have been a perfect locking mechanic for rivens. But instead they allow you to get another slot machine riven. Having more rivens isn't what I want but I might be in the minority.