Hello,
It seems that this thread is the right place to get answers on the missing features I used to love Evernote for, adding to the things mentioned above, here's my list:
Tags: are harder to use and no longer serve their purpose.
I can no longer select multiple tags at the same time from the tags sidebar. Once I click on the tag it closes the sidebar and applies a filter based on that one selection.
Previously, when I select a tag, it highlights all the combinations (which was very useful).
I have sub-tabs, the buttons for expanding and collapsing