Freshmaker
I am Korean.
I think one of the themes in the films is the passing of the time of Elves. PJ spends a lot of time with this and to have them show up at Helm's Deep is a cathartic moment. True to the book or not its effective in the films and I think it's more than just an ELVES R KEWL moment.
It makes absolutely no sense. Kills the tension of the entire scene.
It's also baffling. Legolas = Spiderman.
Elf in armor = just another random dude.
You'd think an army of Legolas' would be shield surfing and dancing among the orcs with impunity. Instead, they're archers, and... That's it.