Regarding Tauriel

I suppose if you're going to invent a gratuitously plot-extending character out of whole cloth, you could do worse than a beautiful and totally kick-ass warrior elf-maid. Such characters are not unknown in the cannon.

And given the precedence of fluidly poetic elf names like Eärendil the Mariner, Elrond Halfelven and Luthien Tinuviel, couldn't Tauriel have been given a more elaborately Elvish appellation; maybe something along the lines of Elvangien Lilliel?

Granted, that might seem a bit over-blown for a common wood elf.

But since the whole thing was overblown, it at least has the virtue of thematic consistency.