I’d like to add my quick two cents and mention that I really like using an Archer for their melee capabilities. Playing an Archer with the mindset of being right up there with your teammates (as in being 10-15 feet away from the fighting) and being ready to bring out your dagger to backstab an enemy has been a blast for me. I figure that 50% backstab damage bonus for Archers has to be for something, so usually if I miss with a crossbow and a friendly is losing a battle with an enemy, I help out with a good backstab or two.
That’s why Archers are more like a neat Rogue class to me, and being in the thick of battle with them seems more rewarding than camping back where it’s safe, especially since it’s more helpful for your teammates (such as if you’re playing King of the Hill or have to push a cart of whatever), and the large majority of players who hate Archers can have a better chance to kill you.
With the added challenge of most weapons being able to one-shot you, I think they’ve really created a class that requires some skill to pull off successfully (not to say that the other ones don’t, but being an Archer has a unique challenge of its own). Plus, backstabbing someone to death has something horribly satisfying about it.