The default view for LineUps is quite limited (presumably on purpose). But it would be great if you could customise what is shown. If you have the same tasks across multiple lists/folders, for example, it's just going to show the same thing three times.
What would be really helpful would be the ability to:
a) show task locations
b) change how many tasks are shown,
c) change what data is shown (similar to customising Rollups).
Also, it would be nice to be able to turn off Trending tasks to allow more room for LineUp tasks.