Thank you for your input! We will consider this functionality in upcoming releases if it will be popular.
Everyone, please continue voting for this feature if you consider it important.
I see that notification “Customer account creation” can be modified in Tools & Settings > Notifications
Please clarify your request?
IGBryson DeVilbiss commented
This is not referring to Customer Account Creation - instead this request is to modify when a User account is created (in Power User view) and an "Account Activation" email is sent.