#3 Fabinho playing CDM helps unlock the playmaking abilities of Thiago and Wijnaldum

Although it's three of their main centre-backs that Liverpool are missing, their midfield and attack have suffered too. In the absence of their go-to centre-back options, Fabinho has had to slot in at centre-back and this has curbed Liverpool's control in the midfield realms.
Now that Fabinho will be playing in defensive midfield as Nat Phillips and Ozan Kabak have done a decent job in defense, Thiago and Georginio Wijnaldum will be able to play with a lot more freedom.
Thiago Alcantara has looked a little lost in the center of the pitch and has not been able to gel well with his new teammates. Fabinho is a player who can play to his teammates' strengths and he will be key to unlocking Thiago's playmaking abilities.
#2 The return of Diogo Jota and Roberto Firmino adds depth to Liverpool's attack

Liverpool's attacking trio of Roberto Firmino, Sadio Mane and Mohamed Salah have been nearly unstoppable over the past few years. However, they have been nowhere near their best this term. While the frontline wasn't clicking early in the season, Diogo Jota's introduction proved to be really effective.
The Portuguese attacker was sidelined for almost three months due to injury but has now returned. In his last four games for both club and country, Jota has scored four goals and provided an assist. He will add some much-needed dynamism to Liverpool's attack.
#1 Ozan Kabak - Nat Phillips partnership has settled down and worked in the last few games

Liverpool have had several injury concerns throughout the season but it is the absence of their first-choice center backs that has affected them the most.
Virgil van Dijk, Joe Gomez and Joel Matip have all been sidelined and this forced Liverpool to field Fabinho and Jordan Henderson to play in defense, thereby relinquishing a fair amount of control in midfield. However, they've been able to restore some stability at the back in recent times.
January signing Ozan Kabak has held the fort down with Nathaniel Phillips at centre-back. They have kept clean-sheets in their last two matches. This will, in turn, enable Fabinho to play in his preferred role in defensive midfield.
As a result, they will be stronger in attack and it will enable Liverpool to play their natural game.