Improve the user interface so we know what will happen when we take an action.
The user has no idea what will happen when clicking a button.
There is text that is clickable and it is not at all obvious it is a button.
Some buttons with the arrow > open the next level and others go to a browser window.
Some buttons allow changes and other buttons make a call when this was not what the intention.
This assumes the user knows which are clickable buttons and which are not.
Very confusing interface with lots of basic function missing or hidden.
I do not have time to play adventure games with work software to discover how or if functions work.
Amen to that. I am troubled by the intuitiveness of the Flat UI paradigm, and honestly, fluent design is not going to make any difference. It's like putting lipstick on a pig. What's wrong with bevelled controls, menus?
Sean Ellis commented
Classic flat UI problem - there is no "affordance" for what items can be interacted with.
The removal of well-known and long-standardised UI elements such as menus means that features are hidden throughout the interface.
This is presumably a consequence of the ideology that the constraints of interaction for a smartphone with a 5" screen are the same as those on a desktop computer with two 24" monitors and an accurate pointing device.