The main one is multiple tabs in one window. It's unwieldy and frustrating having to juggle multiple windows, very much disrupting my workflow.
The second is being able to sneak paragraph-formatting (specifically lists) into encrypted text blocks. Even opening my encrypted text blocks yesterday (after the forced software update) erased the list formatting, which actually caused knowledge loss. All my list indentation—hierarchies of information—previously held meaning which I can no longer retrieve or reference, ever.
There are other irksome changes, too. For example:
Simply opening encrypted text blocks updates the edit time of a note, even though there were no changes.
The home screen is an irritation because I can't really use it, since I'm on a legacy subscription (updating my subscription would put Evernote out of reach, financially).
No longer being able to use search grammar, such as excluding a certain tag while including others. Legacy Evernote's search grammar was amazing. I have been informed this is still possible.
I know change is inevitable, and I'm working on becoming more resilient to change. I also know that it's impossible to expect a software company's feature/development decisions to always exactly match and support my use of a product. The solution to that would be to allow me to choose which version of the software to use, functionally opting out of future development.
I'm an old-school tech person and I'm weary of the SaaS, subscription-based world, where applications are just shells that load the most recent rules from the cloud instead of being functional, standalone programs.