I have no idea of your planned changes for the next version/release, but checking in Usage just now, it occurred to me how simple it would be to add a check box to each subsection graph title (Incoming, Outgoing, External, Local) to let me choose what I see “on the fly”. That would eliminate the Options drop box and you can just put in a Usage Alerts button. So the drop box wouldn’t be needed and all options are laid out and self-explanatory.
Just like in the just released 1.1.35b, the various display options (but not the Alert Options) should be “sticky” (remembered on re-start).