People like to remember something, which makes sense. The long and short URLs at Google docs do not make sense. The situation at G suite looks similiar.
To strive for a high ranking in search engines for such a page is lost love effort. The rule will be that search engines don't list such pages at all.
It is advisable to register your own New-Domain for such documents.
This increases the chances of the entire content also appearing in search engines.
For such cases, Google now offers the New-Domains as a solution. You register a New-Domain such as balance2020.new or workgroup.new and redirect the New-Domain to your document.
The New-Domain enables a secure namespace, which means that https is required for all websites at .new. You may buy a new domain and park the new domain, but it only works in a browser with SSL encryption.
The New-Domain is - as Google explains - a "top-level domain that is HSTS-preloaded. The HSTS preload list is a list of websites which modern browsers will only load over an encrypted connection".
The uncomplicated creation of a secure namespace through .new is the reason why the new domain is especially useful for such teamwork projects - more than other domain endings. When working on projects, confidential information is often used and it is advisable to protect it using SSL encryption.
Hans-Peter Oswald
http://www.domainregistry.de/... (English)
http://www.domainregistry.de/... (German