I am not even sure if this is necessary, but a sandbox mode would be nice. Although the Defense+ is great, sandboxes like Defensewall and sandboxie are so simple.
If I remember correctly… I think Comodo is working on a sandbox type program, Not sure how the progress is going…I like the idea of isolation .
P.S Sandboxie is my fav 
Sorry guys but Sandbox has been stopped. Reason is Sandbox is also vulnerable - that includes sandboxie. The reason is something MUCH better is coming, Something that turns your PC back in time!
Wait and see.
Josh
Offtopic: “Something that turns your PC back in time!” © means times of 33Mhz (yes Mhz), 4Mb RAM and same speed of working? =)