I think you can do a MK Lite with Universal Thrill rides park. Have the kid properties everyone is talking about with DreamWorks and Nintendo, but unlike MK, have some rides over 48 inches. MK doesn't have anything over 44" and I think it is well rounded park other than it has no huge thrills like a big steal coaster or Mummy type rides. So take all these kid properties and do MK like park. Dark rides, Spinners, Flats, Family Coaster, boat rides, etc. Then put in the 40", 42", & 44" simulator rides in 3 or 4 lands. Then add in a high thrills ride in 3 or 4 lands. So the lands would have the kids rides, but then can have a thrill ride in it. So each land would have either a thrill simulator 3D type ride (i.e. Transformers or Gringotts) or a high thrill ride (i.e. FJ or Hulk). I think if they did this, it would be the most well rounded park in Orlando and get everyone to come to it.
One thing I loved about the concept of Hard Rock was each "land" had a show, flat ride, play area, and coaster. I would like to see the 3rd park build even more on this concept where each land has a ride anyone can go on and a thrill ride. I think that having some young kid rides, shows, play lands, and water rides also scattered about throughout the lands would be good too since you don't want each land only having 2 rides. Then some lands have more than one family style rides. You could do that type of thing with all of the IPs mentioned.