I enjoyed the photo from the air, thank you.
That is just not true. They hardly are using a 1/4 of the possible capacity based on the design. They don't even own enough trams to use 3/4 of the maximum capacity. For the Mickey & Friends structure the tram stop is built at both ends with four separate loading/unloading areas. Each can be used as both a loading/unloading stop simultaneously if necessary which is rarely the case since at peak times guests are usually coming or going, but not both.Also one of the reasons DCA isn't open as long as Disneyland is exit capacity issues, the trams cant handle both parks closing at once.
Presently, Disney primarily uses one spot for loading /unloading at the structure and over at the resort they typically use again only two spots, but only for one function load or unload, in each location. During busier departure periods they will load trams going back to the structure on a second spot, opposite the most frequently used one.
DCA's hours are based on demand, not on parking tram capacity. Both parks could operate the same hours without issue. Another fact that supports my argument is the fact that guests don't all leave at the same time. More will leave at a period of time like at the end of a show or parade, but not everyone departs. When a park hits the posted closing time usually most guests have already gone.
The longest I have ever had to wait was for two trams to pass before I could board. I'd guess it was less than 5 minutes.
Finally, Disney should focus the efforts on building out California Adventure and on new attractions in Disneyland before it attempts a third park. The need is not there yet.