In that you can drag and drop addresses in the left pane of the Managed IP view, it would be good to have the ability to combine already existing consecutive subnets into one supernet as well as existing consecutive supernets into a larger supernet by dragging and dropping one subnet or supernet onto the other (to include a warning pop-up...Are you sure you want to do this?). For example, let's say you have a subnet of 10.1.1.0/25 and 10.1.1.128/25 and want to merge them as one subnet as 10.1.1.0 /24. Another example, merge subnets 10.1.1.0/24 and 10.1.2.0/24 into 10.1.1.0/23.
Makes sense, great idea. Not something that will make it into 1.0, but something to consider for a follow on release.