In reply to Milan Petrovic.

I totally agree. I am now clicking all over the place trying to find a block's menu for alignment eg on buttons, as there is no visual cue. Columns are the same.

Tables still cannot be edited for font or point size, it is hard to identify which blocks are provided by which plugin, I have to use three different ones to replace plugins that no longer work because some blocks still do not work correctly.
I have a plugin that calculates values but put two shortcodes in adjacent cells in a table and it plays havoc with bits of table code appearing all over the place. Why is 5.5 so different from 5.4? Where is the migration path?

I have used WP for over ten years but my less techy users are pulling their hair out with all the editor changes. I am seriously considering moving to another CMS. Looks like Wordpress is going to lose its premier position, see w3c decision. I fear its had its day.