Removing options in an attempt not to overwhelm the user is understandable, as long as those of us who wish to do so have a way of managing our money effectively. If that means that Monzo simply expose the data and users have to develop their own third-party tools then fine, as long as they’re supported.
If it turns out I switched to Monzo for a more modern and effective organisation of money, and now it’s deciding to over-simplify, that is also fine. App-banking is an emerging market with lots of competitors springing up, so Monzo has an opportunity to carve itself a niche, and simplicity has proven a winner for tech before.
Personally I need functionality, so will be watching to see how this develops!