Why though? Besides Ellie not knowing to how to swim not existing in the adaptation, I felt like it was the big miss of this episode. It would have tied perfectly with episode 1. You don't even have to reproduce the scene 1 to 1, just find a way to get to the climax. I'd have taken that over the suicide bit.
honestly, i'm hoping part of the reason they didn't lean too hard into the zombies is to eventually show ellie and joel becoming more capable as the show continues. in season 1, they can barely handle regular zombies, and needed luck to get past a few clickers. if they're taking those same infected out no problem down the road it makes the threat of new, more dangerous infected more credible by extension.
i personally thought they did a really good job of selling the threat of the undead, so i dont have any issue with them removing some of the bigger horde scenes from the game. these characters wouldn't survive going head up with a single bloater without heavy ordnance. never mind 3 bloaters and a horde of walkers + clickers.
one other complaint i had is that i wish they would have scaled back the number of surviving fireflies in the hospital, because at no point in the show was joel set up to be
that much of a badass. i was fine with it. but i was hoping they showed the fireflies on their last legs, or did something else to show why joel could take them on and pull it off.
even if he took a couple hits for example, it still would have fit his lie that he escaped from raiders.
instead, the reasons for his success were mostly implied: he completed the trip to utah, while marlene struggled to get there in one piece. so her team wasn't as capable as they appeared.