...vs. its intended goals. Outcomes here.
Per what we're hearing so far: Seems to me that anti-immigration people who oppose it don't have to worry much about anywhere close to "11 million human beings" making official citizenship. Just the idea of signing up to start on the long path, with the prospect of the tide changing and a regime change somewhere down the line, could be a fool's bet. And those affected must see this right off. At best, many make it as far as neither/nor/nether status. At worst, it's "Here I am!" for that looong time.
In their place, would you take the bet? I suggest that it's down to the time it would take. Two to three years? Thumbs up. Ten? Not so much.
Then, what's the impact vs. the 11 million human beings?