Hussar said:
D&D has long survived lots and lots of creatures that look pretty darn similar. Heck, thirty years of balors and pit fiends that looked pretty much identical wasn't a problem, why is this?
Very true. Heck, if you couldn't find a demon and devil that looked like brothers in earlier editions, you really weren't trying very hard.
I don't really see the Angels and Archons as being similar. They share some minor surface similarities, and Angels
can use elemental attacks. If the two are not different enough for your tastes, it would seem every vaguely humanoid creature would need to be redesigned.
Elves, eladrin, dwarves, halflings, all out the door, because they look too human. We can't have more than one species of dragon, otherwise all the dragons start looking alike--they'd all have claws and tails and wings and teeth and scales and breath weapons, after all. In fact, probably 90% of all monsters ever conceived would have to be rebuilt from the ground up to have no similarity whatsoever to any other.
This is, of course, a
horrible idea. The point is: Where do you draw the line? How similar is too similar? That line is, of course, in a different place for everyone. But if you're saying Archons and Angels look too much alike, you cannot say differently about Humans and Elves with a straight face (or any of the other humanoid races--by gods, they're even
called humanoid). And I don't hear anyone clamoring for elves to be visually reconcepted.