I can’t answer for him, but I can tell you the things that are harder for me:
Writing paragraphs
Editing paragraphs
Writing headlines
Editing headlines
Adding links
Editing links
Inserting images
Formatting images
Editing HTML
Formatting posts
Literally 100% of the things I do related to blog posts are more difficult, more time consuming, and produce a noticeably worse result when using Gutenberg. I know you guys work hard, so I don’t want to give negative feedback for the sake of it. But honestly, this is bad enough that if it’s the way of the future, I’ll need to consider switching platforms.