Tolkien decided that Arwen in a larger dose would be better. Would he have completely taken out Glorfindel though, who helped Strider fight off the Nazgul, who went to the trouble of bringing back to Middle-earth from Mandos? Arwen's role is already ballooned in the Two Towers - a book she wasn't even in to begin with. That seems certainly big enough.<P>Why totally leave out Radagast, a scene that would've taken all of 30 seconds, but moved the plot along better than just "Hmm...I'll go to Isengard and see what Saruman thinks."? The wise were already suspicious of Saruman after he said they should not move in on the Necromancer.
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...take counsel with thyself, and remember who and what thou art.
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