Overwrite the BuddyPress Registration
You can overwrite the BuddyPress Registration and redirect the users to an individual page instead of using the BuddyPress Page where the login and registration is displayed site by site.
You can select the Registration Page and Registration Form. If you only want to change the Form keep the Registration Page as WordPress Default.
Tip! Combine with the Custom Login Page Extension to create some nice Registration and Login Workflow and overwrite the default WordPress and BuddyPress Login and Registration