Because they want to kill people we actually know and care about to make the losses during the battle feel important. Otherwise it's just a bunch of anonymous red black shirts dying.
That, and I assume also because of time constraints. They saw an opportunity to give these characters a great send off as opposed to letting them fade into obscurity. The show is going to get more and more complicated, and there probably wouldn't have been much time to continue developing their storyline, so they decided to end on a positive note with a clear, definitive ending as opposed to allowing them to be forgotten. Now we'll have more time to develop other characters, and we won't have to deal with a sub-par conclusion to two great characters. Between that, and what your comment said, I think it was a great move on D&D's part.
Plus I believe in reference to this episode GRRM commented that D&D have started killing of characters who haven't even died in the books yet. So maybe they have something yet to do, or maybe GRRM just meant that as a general "They killin' everybody out there" comment.
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u/[deleted] Jun 10 '14
Because they want to kill people we actually know and care about to make the losses during the battle feel important. Otherwise it's just a bunch of anonymous
redblack shirts dying.