Disneyland is over 60 freaking years old! And trust me, it has problems (take a look at that Tomorrowland), but easily among the healthiest Disney parks in the franchise in terms of capacity. DCA still isn't.
Star Wars Land is something MAJOR. The fact that they aren't investing to at least throw DCA something in terms of additional capacity is weird. In fact, they were supposed to have a small Marvel land with an E-ticket opened by 2020 solely due to SWL, but it's been delayed becuase Shanghai and stuff. Yet I don't think Parks and Resorts should see funding cut (especially when they're doing so boffo business) because Iger made a couple bad decisions. You still build up the others to make sure you don't run into more problems down the road, period.
Have we not learned this from the 90s post-DLP? Seriously?
Edit: also a nighttime parade can't work at DCA due to WoC without significant changes. That's why they've leaned so heavily on the dance parties (also: booze sales)
2nd edit: also can we stop acting like the DCA expansion just happened? It's currently been three-and-a-half years since it opened and nearly a decade since the money was put forward to implement it. (2007) Seriously.