I can tell you about my son's experiences just this past April (turned 11 in January):
We had been on four previous cruises, so my son was VERY excited to age up to the Edge (verses the ages 3-12 Kid's Club - Oceaneer's Lab/Club). He loved the Edge, but he would also still go to the Oceaneer's Lab with his younger brothers if he wasn't interested in the activity going on in the Edge. According to the navigator app, it seemed there was pretty much an organized activity going on most of the time in the Edge. On occasion the events were outside the club (late night dodgeball on the basketball court, Edge takes over the Lab, etc.) But, he said you could also just hang out in the Edge if you wanted to (i.e. play video games, socialize, etc.). Basically, he made friends in the Edge and Lab and we hardly saw him the whole week! But, we had been on the ship before, so he knew his way around and we gave him an old phone of ours with the navigator app so that we could stay in contact. He always had to tell us where he was going so we knew where he was at all times. He loved the freedom. He was the last one back to the room every night after participating in the Edge activities that go until midnight, sometimes 1am!
Note that the Edge does not have secure check in/check out like Oceaneer's Lab/Club. Your daughter can come and go as she pleases (of course you can have an arrangement that she stays there, but the staff will not prevent her from leaving). Also, your daughter is old enough to have check in/check out privileges in the Lab/Club too. We gave our son these privileges. We would get a notification via the app when he had checked in or out of the Lab/Club. (and he also would text us).
Hope this helps!