The biggest change that I see is the new Gutenberg editor. I disliked it from the moment I tried to use it. I have been using the "classic editor" for so many years and could get a blog post formatted and published in no time. That is not the case with the new editor. Sure, part of it will be the learning curve but I don't have the patience for that right now. The one post that I did try and get through seemed to conflict with Yoast as well. Couldn't get the correct word count. I'm sure that plugin will be updated (if not already). Thankfully they have the classic editor plugin available and it will be supported until 2022.
Felt so too, but after a few tries i kinda got a hang of it. If you are use to page builders like Elementor and DIVI, the Gutenberg should no be a problem. Again, you really ned to start now because most plugins are now transitioning to the Gutenberg era, and if any one of them still stay pre-Gutenberg, then such could be regarded as obsolete. Again, its a good thing one can still get a feel of what it used to be before this 5.0, and the classic editor will one day be waved a final goodbye.
Wordpress 5 is better than the previous one but Gutenberg editor is not good/easy to use as using classic editor since years...
I also don't like Gutenberg Editor. Classic editor is more easy to use but changing results improvement.
I didn't like Gutenberg simply because you were 'forced' to use it but that's changed now. I'm actually pretty open to learning simply because learning and innovation are a good part of life. The setup with 'blocks' seems interesting and can be a real thing going forward like a low budget front end page builder like elementor and divi. Right now it might not be much but it will be better going forward