HubSpot is an evolving platform, which is one of the things I love about it.
That being said, I think something that has gone unsaid is that changelogs (the monthly release notes) aren't being promoted. I never I was shocked to discover that HubSpot's release notes haven't been consistent until this year. I'm always taken by surprise when I go to a new page/tool to discover it has a completely new interface. Even worse, new features could be added—either to existing tools or they might be new tools in and of themselves—with zero notice.
I'm not saying I need HubSpot to give me a play-by-play, but it would have been pretty nice to know that—for example—the campaign budgeting system was added. I understand that the Release Notes for a given month are released after that month has ended, but how are users supposed to take advantage of these new features—and how am I supposed to advocate for these features to my clients—if no one knows about them?