I wouldn't bet big on Liverpool as I think it will be close, but I think they can get the job done there. If they can beat Barca 4-0 at Anfield then they can beat ATL, but away goals can be deadly. If ATL get an early goal the game will be completely different, but we've seen Liverpool can play under pressure in the Barca match and last nights game.
It's definitely risky putting big bets on LFC, as they showed they are not invincible. The game at ATL was a good demonstration. By all metrics, their statistics for the game suggest they should have one, time of possession, pass accuracy, 7 corners... But they had 8 shots with none on target. Atletico figured out some thing to stop the juggernaut.
I have no doubt that they will score at least two when playing ATL at Anfield, and proceed in the CL, but they're not going to get any thing fro free. I imagine every club in the CL want to see LFC toppled, and will bring forth their best game. Look at the inspired way West Ham played against them. It's going to be like that for the rest of their EPL and CL matches.