Didn't David Ornstein wrote a lengthy article about the RVP saga? He claimed that RVP apparently told Wenger if he forced him to stay, he will leave on a bosman to which Wenger says he will sell him then, to abroad. But he forced Wenger's hand by saying he will only move to Manure.
Back to Sterling, this is how he compares to other u21 players in europe. (Had to google Benjamin Mendy, interesting stats there)

Ability to play in so many roles is impressive too.

Liverpool will definitely miss him if he leaves. Would be interesting to see how they cope with having key players leave every season like us in the past.
