I keep pondering which of the missing features that I need. For me there are just two things that don't work and significantly affect my workflow. Import Folders and the associated stuff connected to scanning. So far I haven't found any other application I could switch to which would provide me with those features. Other stuff that I'm missing at present is announced as being in the pipeline so I should, eventually, be content with the new EN - at least resigned to having lost the one thing that is truly useful. But I have easy workarounds.
In the meantime, because v6.25 is retained to allow parallel working I get the best of both worlds.
I do think that this roll-out could have been better managed and presented. Perhaps announce v10 as a public Beta rather than a full release. A clearer communication of what is being worked on, what has gone for good, and what might be kept if enough folk make a case.
I also realise that re-launching a product like Evernote which is mature in its market means that there are thousands of users all doing things just a bit differntly and the changes don't work for any of them. For some things like the position of the TAGS dialogue it isn't a major issue. I've already found the habit of looking to the bottom left corner. I'd have kept it top left but it isn't a big deal.
So I think I'll probably be staying with Evernote only because nobody else offers what I'm missing. I have my life invested inside Evernote and shifting to OneNote/Notion/Nimbus/Joplin etc will all give me more work to learn and develop new workflows. So I might as well stay where I am and take short-lived pain of transition made easier by having both versions running side-by-side.
Of course, YMMV.