Creating new column types in modern SharePoint lists and libraries

I've got to concur with most on this thread, it appears that SharePoint Online is being updated to solely support dynamic collaboration for small project teams with little (Read no) consideration for any form of corporate information architecture, metadata standards, classification, security, indeed any good practice Enteprise Information Management practices. It's like the bad old days where IT installed SharePoint and then anyone in the organisation could create their own sites, add everyone to the Owners group, create more sites, create more Owners, more sites, more libraries, more lists, more columns, etc. etc. We need to learn from history otherwise we are doomed to repeat it.

I'm trying to implement governance across our Office 365 environment, we are a small government agency circa 180 users, we need to provide a solution to allow teams to work together and break down our siloes, but we need to do it in a good practice way, so that we can meet our legal and regulatory requirements, ensure minimum security classification is applied, use standard enterprise taxonomies, content types, columns, so we can use standard business Workflows, provide oversight and so forth. Everything I've seen from SharePoint Online seems to be focussed on ad-hoc project teams, not corporate content management for medium to large organisations, this needs to change. At the moment it's like trying to herd cats.

Who in Microsoft can I communicate this glaring gap in the strategy too?