I think interface is a bit messy, sometimes is hard to find or select something. If it’s hard for developers, it will be even harder for clients. In my opinion Gutenberg is exaggeratedly clean for a new tool that intends to be into core. For example – When using columns, it’s not that easy to select a particular cell or its elements, the same happens to find those plus icons, move up and move down buttons, settings button and so on.
Gutenberg has some similarities with Elementor plugin, would probably help if it had similar UX/UI for now (I know it sounds newbie, but majority of people like it), then gradually improving to reach a cleaner interface.
That’s the cons, but on the other hand, I don’t know why so many people are complaining, because classic editor is outdated, maybe changing is not that easy for everyone. Gutenberg is a move forward, i’m excited about it.