I would like to be able to view multiple things as a grid. It would allow you to look at all the extensions at one time. It would allow you to compare settings between extensions, i.e. which ones have NAT enabled. It would be similar to the screen when you click on 'User Extensions' but it would have more fields. It could also allow you to change a setting on multiple extensions quickly.
I often want to quickly see if one of the extensions has forwarding enabled. A grid could display that nicely.
There could be a screen where you choose what fields you would like included in the grid.