Didn't use it much on the 4S, found dictation is much better on iOS 6. Also like being able to ask her about sports scores and move times. The "Launch" command finally working properly is great too. I use it a lot more now on iOS 6.
I'm just curious- what else would you like it to do? What you've listed sounds like a lot to me. Obviously, there is a lot more you CAN do, but would you use it more if it did specific other things? (keep it clean!)
On both my iPad and my iPhone5.
I find it to be pretty useless, but am I missing something? What are the MOST helpful things that Siri does for you?