This is just my personal opinion which I know a lot of people might not really agree with, but the reason I'm not as upset about DCA's tower is that it's not ruining something like what DHS's tower would ruin in the surrounding land. For DHS, Sunset Blvd is one of the best lands all around in WDW, and this single move would ruin all of the theme completely. In DCA, it's really not messing with the theme of the area or the park than anything else that already has changed it.
If we can have multiple coasters, boat rides, omnimovers, regular dark rides, simulators, I don't see having more than one drop tower an issue.
That's what I have been saying this entire time. They want to find some way to get GotG into the parks, I have to imagine a Star Tours replacement would be by far the quickest, cheapest and easiest. Simulator films can't be that hard to replace, and the futuristic theming of ST can be remodeled into some other type of sci-fi setting from GotG.
It would be cool and has been something thought up by many on here, though it's been said that this is not in the plans at all.