Why did we sell JR? Cutting costs, rarely in match form, football has evolved, context: playing in the world's most physical and intense league for a team that is average, and where defensive solidity weighs more than the opposite. JR also does not fit Benitez's philosophy, or most modern mangers' philosophy.
Some people constantly mention that it is not important to run, but it is more important what you do with the ball. It's just a myth. Of course, what you do with the ball is important, but teams that prioritize ball possession do not run significantly less during a football match. Xavi was, for example, the player who ran the most for Barcelona in almost every match, and a player like Inestia was not far behind.
So what you do with the ball is no more important than what you do without. During a match, a player has the ball on average for 3-4 minutes, so I would say it is more important what the player does without the ball.