Went to the waterpark there last month and the hotel looks unbelieveable.
I wouldn't bother with all inclusive as there are great places to eat. Go on TimeOut Dubai website, should give you an idea of where to go for food and other activities. The marina is nice, Media City for Hard Rock Cafe, the Dubai Mall is a must as well. Plus the usual Burj Khalifa and souks.
If you have time and a car drive out to the Yas Marina Circuit and go to Ferrari World.