But unfortunately, this season Liverpool will only play in the Europa League because Liverpool failed to finish in the top four last season. But even so, it certainly doesn't matter, because the Europa League is also still a big competition that will also be targeted for Liverpool to win the title there.
Don't play in Champions League will be less pressure for Liverpool but Europa League will be more easily and less pressure with them but definitely it won't be pressure-free. I am sure Liverpool will want to go as far as possible in Europa League and if they see opportunity to win it, they will do their best. It will require them to actually focus on Europa League if they go deep in knock out phase and it will impact their play resource, fitness and concentration for Premier League.
I don't think it matters if Liverpool has to play in the Europa League, because that was a consequence of last season. Meanwhile, this season Klopp will try to repair what was lost last season which resulted in them failing to enter the Champions League. Because this is the start of the season the real test is clearly yet to come, because being a consistent team is not easy. Therefore, clubs in the Premier League especially giant clubs try to carry out a player rotation strategy to adapt when facing opponents who are not too strong.
Back reviewing Liverpool against Newcastle, Jurgen Klopp proved that even though he had to be with 10 players, the pressure was actually increasing. I understand that Liverpool mentality is used to losing one player.