I recently had a conversation with the CTO of my employer about migration to Electron based apps. We've experienced a similar string of complaints from users. Essentially, we bloated our app, removed a lot of functionality and made users unhappy for the sake of having "one code base". I said "How many customers are you willing to lose in the name of saving development effort?". We're going back to native apps now.
I think the same conversation needs to be had at Evernote. I rolled back to 7.14, and am looking at migrating to other note taking apps now.
Edit: Ironically, I realized this forum's text editor is a more powerful text editor than Evernote 10.