When editing text by double-clicking a shape or sticky, I find the auto-zoom disorienting. On stickies, it zooms in maybe 50% more than I would expect. If I'm editing or creating many stickies, around half of my navigation actions are zooming back to where I was before I double clicked. As I'm doing editing, my goals as a user are to have readable text, but also maintain the context of my current view whenever possible.
It's also disorienting for observers if they are watching me create a board via screen sharing. There's a lot of zooming in and out going on just to create 5 stickies and it's worse for them since they don't have control or feedback.