Although it looks cluttered or busy in the footer with all the elements showing. Each link does contain a function to help your email. Please note, both the Unsubscribe and the physical mailing address cannot be removed, due to the CAN-SPAM legislation.
An example would be the Manage Subscription link. By removing this option, your audience may not be able to edit their subscription, and may unsubscribe on their own. It is possible to see an increase of unsubscribes in your results. As a GDPR requirement, we provide a field for your subscribers to request to see or change information about them. After your subscriber submits a change request, a system email is sent to you to inform you of the subscriber’s request, you must take appropriate actions based on this notice.
Also an incentive to the Forward Email button is to track emails to see if your email is being forwarded to a larger audience. The same goes for the sent to information. This will show your recipient which email address is doing the sending.