Actually, while its still a really good drawing, it's not especially "canonical" : Noldor don't use curved swords (except in Jackson's movies). There is only one we know with a curved sword and it's Egalmoth, not Glorfindel (Lost Tales : the Fall of Gondolin). The fact that in all Gondolin's equipment Tolkien precised that this sword was curved tend to prove that all the others were not. Or what's the point ? if I say : "his hair is dark" to describe somebody in Vietnam it don't make sense for example. But I make sense in Norway. Yeah I know I make caricatures but I didn't have any clever idea. So the Elven swords are probably like european swords in general. Besides it makes sense : the Elves were created for an English Mythology, I don't see them with katanas (or wathever kind of japanese sword) but with claymore (or wathever kind of Northen European sword). The only people with curved swords we know are Orcs, using in general scimitars, that Tolkien called "hell-blades" in a strophe of the Lay of Leithian. It will be weird to see Elves with similar swords.
Don't take it bad : it's still a really good drawing and I like the dynamic. Giving two swords to Glorfindel is not a bad idea either : Elves are good with both of their hands, so using two swords seems like a good idea for them