Aedes aegypti is not even native to South America- it's African. So eliminating it from the New World can't do that much damage given that the ecosystem got along fine before it arrived.
Could it not have crowded out some other niche that will be left empty if they were removed?
This logic may have been applicable way back when the first few Aedes aegypti made their way to the New World, but at this point, so much has changed in our New World, and we don't really know all the ecological changes that Aedes aegypti may have already caused. Perhaps, they have become an integral part of our society.
Perhaps, but I don't believe anyone has demonstrated that mosquitoes have this crucial in impact to he health of the ecosystem. In fact, the aforementioned Nature article explicitly argues against that idea, though obviously it's only a sample size of 1.
We need to build a net. They have to go back!
I wonder what kind of South American bug pollinates Cherimoya blooms? The Cherimoya fruit is exceptional, but producing it in California requires hand pollination since some bug that lives in the Andes isn't in California.
Hopefully whatever man dumps into the environment won't create some new nasty... flesh-eating locusts perhaps?