I am far from optimistic regarding the 2nd leg, sitting deep waiting for counters will make Barca happy as they 2-0 up, they will pass it to death if we dont press them for the ball.
If we play more similar than in PL attack a lot, play with two strikers, even one of the CM joins the attacks we will be punised very big time for leaving big spaces for Barca players.
It become extremely hard when we conceded the second goal, its nearly impossible to turn it around, mybe only if we score an early surprise goal which will be very hard given how scared we were in the first 15 minutes of the gam vs them at home.