Ellie in the show kills like one person lmao. In the game, she was throwing bricks at people, shooting at them, and had her own gameplay sections where she killed dozens of David's men. In the show, they just had her kill David and thats about it. Even her first real kill, was eventually finished off by Joel when in the game, she shoots the guy right in the face.
They are just going to have her kill Abby's friends. The rest of it will be walking and talking like this season with maybe a couple of episodes dedicated to side stories. It's Abby who got the best setpieces in the game anyway. I think Ellie got the Jeep chase with Jessie and that was it for setpeices. Abby got her own chase sequence, a horde chase, rat king, the epic island chase through the burning villages, and of course the forest chase.
But yes, TLOU2 is going to be a rough story to adapt. The entire basis of the story is to have the PLAYER choose to forgive Abby, and playing with our emotions. I dont know how they adapt that into the show where you're a passive participant. Abby better be played by a super charismatic actress because shes just so damn unlikable in the game. With Ellie also being super unlikable in the sequel losing her entire charming personality, the show is going to have a tough time making us care about both protagonists.