Planning is not complex unless you make it that way. It can be annoying or frustrating, but it's not complex.
Literally "planning" breaks down to picking ADRs at 180 days. Picking FPs at 60 days and then showing up. The rest isn't really needed outside of normal vacation planning. Does it suck for some people to have to pick which park they go to whatever day 180 days out? Sure. But it's not complex unless you make it so by creating a minute by minute spreadsheet. But you can do that with anything if you want to.
The trouble with making ADRS 180 days out is that the park hours usually aren't posted for 180 days out. Further, once they are posted, they are often altered a month before which may affect the times I desire for my ressies and which usually can't be changed at that point.