The long queues you hear of are not necesserily because the parks are busy, often just because the operations are so slow.
Dinoconda, for example, had a 90 minute queue when I went, but they were managing about 8-minute dispatches. Long queue, not a lot of people. Wanda Hefei was dead when I went, as were the Fantawild parks in Wuhu, Joyland, everywhere. Only place that was busy was Disney - but at least they manage decent dispatches!
Yeah, done Ferrari World a couple of times when I was working out there and it was always dead. Could easily knock the park out in under two hours, then spend the rest of the day getting re-rides and having a walk round the mall. Much the same for IMG too...