I find arguments from simplicity/complexity to be pointless. Both are relative in the scope of the universe, hence there's no way to truly define one or the other.
Furthermore, the riddle "if a tree falls in the woods and no one is there to hear it, does it make a sound?" can be applied to human observance of simplicity/complexity in the universe. If no one is here to observe it, are there any true simple/complex things? I don't think so. The universe just is the way it is and our limited, but increasing scope of it proves nothing in the realm of intelligent design, rather only continues to raise more questions.