The England striker, who missed the defeats at Norwich and Galatasaray following a bout of tonsillitis, has only three goals to his name so far this season after being utilised in a more withdrawn role by Sir Alex Ferguson.
Robin van Persie is United's top scorer with 11 goals this term, while Javier Hernandez has bagged eight.
"With Robin coming in and the form Javier has been in, I have been playing a different role," said Rooney.
"Of course I want to score goals but if you play in midfield you're obviously not expected to get all of them.
"As I have said throughout my career, I have no problem with that. Now finally we've got the balance right and we have the forwards who can go and score goals.
"That gives the manager an option to play me deeper or pick another forward as well, which is great for the team."
Rooney is looking forward to starting against QPR as United bid to return to winning ways.
He said: "This game can't come quickly enough. We're looking to get back out there in the league and try and get the three points."
The likelihood is United will be facing opponents trying to impress their new manager, with Harry Redknapp expected to replace the sacked Mark Hughes.
"We don't know what to expect now, but we just have to work on what we think is the best way to win the game and concentrate on ourselves," added Rooney.
"They haven't got a manager at the moment but I'm sure whoever does take charge will get them organised.
"They made it difficult for us last season, when they got men behind the ball and I am sure it will be the same this year."