You make a good case for the potential usefulness of these features, but we're talking about necessary features.
This is subjective, of course. For me, being able to use the desktop app without overheating my latop is necessary. Reliable sync between apps is necessary (I regularly get the sync delays and duplicate notes too).
I'm not expecting perfection here; bugs and glitches creep into every service. And you're a user and not an EN developer, I know. But in my subjective opinion, this issue should have warranted a fix already, and it's understandable that users are wary of what might go wrong next.