I emphasize enough how much I dislike the new styling on the text/paragraph style dialogues
It is SOO much harder to select the paragraph (or whatever) style I need now. The key information in that dialogue is the style name, which I know you know because that's what you show when it's selected. But that style name isn't the most visible part of the drop-down. In my case, it's darn hard to see. This is slowing me way down and I'm feeling very grumpy about it.
I was also really irritated when the resize quick keys did a switcheroo here after 20+ years, but I can get over that. This one -though! Apologies for the rant, but please please fix this. Also - why is it all greyscale? The preview doesn't add value if it isn't an actual preview! Half my styles are orange or blue. Am I missing a setting? Help.
This new menu you are seeing is only visible from the properties panel.
You can still see the list of paragraph styles from the Paragraph Styles menu (Type→Paragraph styles) in the same way as it used to be in previous years.
Please let us know if you still face the problem