Good list. Also, if they "left" tomorrow they'd have smaller class sizes and less need for ESL programs in public schools, improving educational quality and outcomes for native children, shorter wait times and greater availability of beds and services in emergency rooms and public hospitals, lower overall crime rates, including reduced gang-related violence, drug distribution, and organized theft rings. Seeing them gone would decrease demand on police, courts, and prisons, freeing up resources and potentially lowering local tax burdens. We'd have less strain on utilities and public works, resulting in more reliable water, electricity, and waste services with fewer outages or disruptions and reduced litter, graffiti, and maintenance costs in parks, streets, and public facilities due to lower transient populations.
So, yeah, material differences that are pretty hard to debate would be the outcome. The government and media are indeed the ones distributing propaganda telling us to stop complaining and embrace their shitty policies "Or else!" in the EU. The "Or else" is that they'll use "hate speech" laws to threaten, fine, imprison and otherwise censor and silence anyone who doesn't think letting in ideologically hostile diseased criminal illiterates isn't a great policy.