I'm glad to see you're quite optimistic about Liverpool, but you should also know that Liverpool and Villareal are teams that have to have chances to lose, draw and win in match regardless of the strategy the coach uses.
Indeed Liverpool have managed to prove that Villareal's defense can still be penetrated with good attack and pressure throughout the match, but Villareal must be wary of especially on the counter-attack in the second leg. A draw is possible, IMO why not?
I agree that Liverpool can win or lose but 2 goals in advantage sounds to be a good one and it is enough for Liverpool to protect it in the second leg and go to final match. They proved that Villareal defense can be broken and in the second leg, Villareal will have to play attacking to score 2 goals in minimum that will open more opportunities for Liverpool to exploit open space with their sleedy players like Salah, Mane, Diaz and Jota.
The four clubs that are the most interesting for us to watch are Real Madrid against Manchester City, because this match will be very hot and the tension will be very hard for both clubs. Tactically, both Manchester City and Real Madrid are not so much different from the first leg, but Real Madrid really benefited from playing at home, even though they lost the first leg, but if you look at the chances of Real Madrid not being so difficult to win the match, because on aggregate the goal is in their favour, another match between Liverpool and Villarreal, surely Liverpool will most likely win the match
They made a very interesting and goal productive match in Etihad stadium. 7 goals and one in difference is what they will start in Bernabeu in aggregated result. It will give Real Madrid more confidence that they can beat Manchester City and have another final then title in Champions League for the club.
They have Benzema who is ready to take and turn any minor opportunity into goal. It is unfair for Benzema if he won't win Ballon d'Or after his amazing show in this season. A final and a title will definitely help Benzema to get his fourth Champions League and first Ballon d'Or