"DNA is much more complex but it works in exactly the same way." 
DNA is more complex, but is does NOT process data in "exactly" the same way that crystals blindly replicate.
For one thing, DNA processing is dependent upon the external environment. For another, DNA is capable of creating life. For yet another, DNA can process entirely different shapes and textures...and do so variably over time per the different instruction sets that it is given.
DNA is not processing information. Where did you miss that? Yes DNA processing is dependant on the outside environment that is why it is not evidence for the existence of God. It may be evidence for the existence of men using it as a processing tool. If you mean that the environment is making DNA change and evolve over time this is not processing it may have another name "evolution" but that isn't processing.
I admit DNA is more complex than a crystal and capable of many different shapes and textures (crystals can form many different shapes). But being more complex does not mean it is evidence of god it merely means it's molecular structure is more complex.
As to the Life comment life is merely a chemical reaction so i don't understand how life is evidence for a creator. This is an old argument not the one we are having.