I didn’t think I’d miss it, but I do: the ability to see how transactions have affected your balance over time.
In the old app, this was represented by the graph at the top, which I didn’t really like. In the new world, the only way I can find is to export a PDF bank statement (which works very well btw).
But there’s no way I can find to view your balance history directly from the app.
Being able to quickly visually confirm why your balance is so low (or so high, I wish) adds peace of mind.