I want to create a character with matter manipulation powers, down to the atomic level. However, I've become aware that this is essentially exactly what Dr. Manhattan from Watchmen does- rearranging matter and spacetime. Though my character has significant limitations compared to Dr. Manhattan (for example, he doesn't have as high an amount of control, and he can't see the future/past/whatever), it's still too similar. Even the name of the power I gave him (omnikinesis) is the same.
How do I differentiate this power from Dr. Manhattan's? I've already given him a material weakness that prevents him from using his abilities when in contact with it, as well as preventing him from using his abilities on the material. (I don't believe Dr. Manhattan has a material weakness, only certain limitations.) But apart from that, how do I make this more unique?