After immigrants are detained by ICE, there are probably records somewhere of who has an attorney, and who is calling family members or an attorney.
For the immigrants who aren't calling any family or lawyers, the poorest of the poor, people with little to no connection to anyone, who may not even say which country they are from, if the administration were actually trying to kill as many disconnected immigrants as possible in secret, would society know?
For example, if the administration was composed of all types of conservative people, but 30 percent were secretly Nazis or wanted racial genocide, could there be a campaign to not just remove, but kill, immigrants, and the public doesn't find out?
Considering that some Founding Fathers wanted the Constitution to be a living document, the answer is obvious: Keep the best parts of the original, incorporate the good ideas from the charters of other nations, remove the awful, and try out wild new concepts that may or may not work.
When it comes to 'weird' ideas, I would like economic promises and rules to be added. You cannot pursue happiness nor prosperity, if you are impoverished. A renewed American society should adopt UBI, free education (all levels and types), universal healthcare, the rights of workers to vote on their leadership and the pay that leadership earns, absolute wealth and income caps, ect.
Wealth is a Goldilocks problem, where too much makes people like Trump or Epstein a common sight, while too little creates a caste of people who cannot live their best lives. I feel that creating floors and ceilings on wealth would help make the next American democracy much more healthy.
In any case, MAGA will 'pick' our ride anyways. As we have seen in Minnepolis, they make their own law. They murdered Pretti and Good, kidnapped children, ignore the 4th Amendment, ect. So we should consider civil war, and the ramifications that come with that, is creating new laws and institutions of our own. An overhauled Constitution is both functional and symbolic - a statement of intent for what we want our nation to become.