Agreed. And if the lazy way out is chosen to have a water park as a 2nd gate...then that would be the wrong way to go IMO. But, I could see Universal Studios Hollywood doing that in favor if keeping costs down and trying to split crowds only for peak season...but....I hate the idea for many reasons: the noise level of a water park means that this park would have to be indoors, and Universal is better than this and I feel water parks can be very cheap. An indoor Volcano Bay is not a good idea.
Anyway, the problem still remains...one entrance for one massive park is inefficient and will force a 2nd gate!