This new experience certainly is an improvement overall I think everyone can agree on that. However, I think Microsoft should have skipped this step and not even look at hub sites or model SharePoint based on a familiar experience such as site collections and subsites. I think Microsoft should have been much more forward thinking.
Lets look at the Office 365 cloud as a single application with building blocks. SharePoint no longer needs to be administratively built by anyone. The Artificial Intelligence engine should be accumulating statistical and behavior patterns on every user logging in. This data should then be presented at the Office 365 Cloud Application level as a building block. Using building blocks of information in the Office 365 Global Cloud Application , a new breed of IT is created that not only depends on Technical know how, but has the creativity to put these building blocks together in order to maximize organizational efficiency.
Another words, enough with SharePoint already. Share (ing) Point (less) Lets focus on what really matters and that is new technology without the stigma of old Branding. In my opinion, OneDrive, Power Apps and Flow have already removed core components of what used to be SharePoint. These technologies where skillfully rebranded. What else does SharePoint do? It delivers News or corporate communications. Why didn't Microsoft simply wait until they release a new function in The Office 365 Platform that allows Corporate or Other types of communications replacing "SharePoint"
However, I am afraid to admit, that I honestly believe Microsoft will never achieve the ultimate goal of cloud computing when they continually fail to provide a clear path forward among other things...:)