One of the reasons IMO the game vs Levante was good, is that we played 4-2-3-1, instead of the sterile at times 4-3-3 with Busi as pivot
Even with Gabi at RW (not his position), the team worked much better on both phases of play.
Coutinho is much better at AM instead of LW
I would try to play the same formation against Benfica, with Frenkie-Gavi double pivot, both are mobile and hard-working enough to make it work and fit like a glove
Depay-Cou-Demir can play behind Luuk, with Ansu playing the last 30 min
Of course Dest at LB and Oscar at RB
Here is a screenshot of the buildup against Levante:
Imagine Frenkie where Busi is, and GAvi where Nico is
Another variation would be GAvi at AM, Cou at LW, Memphis at RW, and the double pivot being Frenkie and Busi (although I would not want Busi to play)