That’d be interesting to see. S2 definitely could benefit with some restructure of its plotline for some better flow.
The big thing I’d cut is a scene in the ending of S1- Jinx sitting on the ‘Jinx chair’ after she kills Silco. This felt like a resolution to her whole is she powder or is she Jinx character arc but S2 decides to ignore this. Cutting that one part of the scene just makes the transition to her character arc in S2 flow more naturally.
For S2 one thing that never got brought up again for Ekko’s story was the whole thing about the tree slowly dying or something because of the Hex, maybe a final shot during the ending montage of the tree looking healthy could provide some resolution for this. Also Ekko and firelights not doing much after Silco’s death to liberate Zaun felt weird so perhaps moving Ekko’s disappearance earlier can help with this.
I also think adding in some shots of the Arcane Noxus trailer for S2s ending would also be ideal to provide a stronger resolution for the black rose plotline and gives Mel a resolution.