I don't mess with how Congress works much, but this is pretty original. Other things like at-large reps are commonplace, but this idea crawled into my head from nowhere.
The object of this is to provide a sharp disincentive for vote suppression. Pretty slick, eh?
You still need the census though, for general purposes, including having some idea of how you'e doing in, say, Delaware, in terms of getting your maximum representatives from your vote-entitled population.
It bears mention in here that the Advocary College will take over the task of setting Congressional district boundaries. Topic 6.