I get 20-50 mails daily through a very easy to use feedback and support function, but in none of those thousands of mails has anyone ever cared about how transitions are made or that a button doesn't look like a native iOS button.
They care about the value the app provides. About new functions or (in my case) report bad data to fix. That's why they download an app. Not because they want the button to look natural.
That's to say. I frequently get feedback about how they love the UX/UI of my app.
If there isn't a valid reason to create a native app these days I consider it a waste of time.