I wish there was a SteemSpace or MySteem where people got more control over their Steem page. You can't even choose your home page's color really. There's at least a dark mode now though. Steemit's source code is available on Github under the name Condenser, and Busy's source is too. Someone could fork Condenser and give people a LOT more control over what they can do with their site.
I think people just want a simple product that is easy to use.
That's probably true for many...but it doesn't explain why so many left. They also could have made it a lot simpler to customize, with a WYSIWYG editor, or something like that. But they didn't change much of anything. I and others kept going back to our MySpaces for a long time occasionally...and it was still all the same. If they had tried harder to improve things, I think they wouldn't have lost so many.
RE: Everything will eventually go the way of MySpace unless you maintain it properly!