I found that the product attribute option is missing something, we are not able to edit the label of them because we don't have any api to update them, we can only add new one to the list or remove one. That is not a good thing since if we are using the options on certain product we cannot just delete it and create a new one, go on each product and change it.
It would be nice that we can change the label of some option even if it's one at a time.
Thank you.