Rovers have abandoned their renowned direct approach since Sam Allardyce was sacked and replaced by Steve Kean, but have also found themselves dragged into the relegation fight.
Manchester City are the visitors to Ewood Park on Monday needing a victory of their own in the chase for a Champions League spot, and 22-year-old Olsson says Blackburn need to fight for their lives.
Olsson, who plays left-back or left wing for Rovers, admitted the players have had to adapt to change since Allardyce left.
He said: "Keano is a different kind of manager, he likes to play the ball on the ground with lots of one-touch, two-touch football. It was different to Sam but we have to get used to that and it has been going well on the pitch but we haven't got the points we wanted.
"To be honest now is not the time to play attractive football, it's about getting points and digging in. Even if we do long balls, I don't really care how we play so long as we get the points."