The Congresscritter who pushed this through is one of the 10 most conservative in the USA, based on ACU voting score. He is also my congresscritter, and he did the right thing.
States are NOT required to "link databases"--but no illegal will be given a driver's license unless it is noted, clearly, that the individual is an illegal.
If the immigrant has a date-certain visa expiry, the date-certain WILL be on the DL, and the DL expires at the same time the visa does.
There will be plenty of States which will not "link DB's"--and it's irrelevant anyway, as the FBI's DB on criminals is national, already.