Rochina, a January capture from the Nou Camp, starred in Rovers' Carling Cup win over Leyton Orient last night.
Yet Kean insists the Spanish kid, who has made just nine starts for the club, must put his tika-taka tricks away.
Kean said: "Ruben is still young. I think we have to ensure there is stability behind his tricks to make sure there is shape to the team.
"He still must learn that because it does not matter where you are playing, if you lose the ball in the wrong areas then you are putting your team in danger.
"That is something we will keep hammering into him and he will get it because that is the only part of the game he has to improve on.
"He doesn't look like a player who doesn't have the ball under control at any time.
"He always has his head up and if you had a freeze frame you would see he is always looking at what is going on.
"If he can learn about when to bounce it off then I think he can go to a very high level.
"He is a difference-maker but he has to adapt to how we want to play."