That's good, umiasha - I'm rather chastened on these matters by The Lodger having decided, after bringing himself up on the streets, that he wanted to start using a litter tray rather than using outside. (Barring being caught short outside which I don't completely know about.)
I didn't mind in the least to be honest. Like you, it became part of routine - and I could avoid any confrontations with neighbours over poo in the rose beds and also keep a weather eye on his general health via the workings of his innards.
Maybe she's gained in confidence as well as she's become a little older or a mean cat or two has disappeared from the neighbourhood so that she can take her time outside - who can tell completely.
It's news to me that ASBO cat actually has any boundaries! I had rather thought that Bengals would be like Siamese in that their territory was basically anywhere they could think about, let alone walk to.