Sorry, misread your post at first. I would also like to see the AI modes expanded like in the previous games, not just Giddy Park. There are so many great customization option that could be offered through the portal and I really hope it is expanded.
Edit - another consideration for this is children playing. Just like adults have preferences for whether they want to play with people they don't know online, so do kids and possibly so do those kids parents. I think this is a safe game for it and don't have any problems with the kids doing it. However, I have a kid that doesn't like playing with people she doesn't know. This makes most of the multiplayer modes unenjoyable for her so she doesn't get to play them. She has enjoyed the AI versions in the previous titles and I think she would enjoy them here if given that option.