Like others. A plane like the 737-700ER can't make any money outside a 7-planes, 7-days schedule. Which is a lot of planning, but also a lot of work once the plane arrives. Planning is fun, simple repetitive work to buy slots is not.
No matter how the GUI is done, or the screen it's in. We need a quick way to buy slots for routes planned months ago and now associated with an existing airframe.