Cambridge University is, presently, a disgrace and one excellent reason for its disgrace is politics. So, sigh, let's listen to Cambridge on politics.
Britain (not part of the EU) runs on the DSA system. It has a Parliament. The majority of Parliament votes for a Prime Minister, even if the people didn't want it. Margaret Thatcher was the Prime Minister throughout the 1980s. To her, is attributed the comment "we have an elected dictatorship". However you think of Thatcher or, if you're DSA, Burnham: I don't think Thatcher ever cracked 50% of the popular vote and we jolly know Burnham hasn't.
Similar has happened to Denmark. Frederik Ravn Klausen, who sounds like a Scandinavian, nonetheless works out of Cambridge (he should leave); he has teamed with Sebastian Tim Holdum in Copenhagen. They propose instead "geographically ranked guaranteed proportionality". Buroughs / ridings / precincts / parishes still exist. But the election winners are chosen by popular vote. So if your Albertan ridings (screw it, let's be Canadian) voted for the Tory, and everyone north and east of the Lakes voted for the Grit; the Grit votes override most of you. Some of your Tories will get through however. From the truest-blue ridings.
As they note, regionality is here sacrificed. It rather has to be, because someone Federal (or Royal) is going to have to guard the ballots wherever the score stands to be run-up. Historically the cities.
An expressly-regional second chamber would counter this. Americans have such a body: the Senate, wired into State boundaries and once-upon-a-time appointed by State legislatures. This is why Americans deserve to take Klausen-Holdum seriously where, frankly, I would never recommend the above system for any unicameral state. Fer cryin'-out-loud, Denmark is made of islands (and a peninsula).
Drawing up the constituencies is still up to the States I guess. On the plus side, if their constituencies might get overridden by their neighbo(u)rs anyway, gerrymandering might not be as hot an issue.
The issue wot I see as hot is if these States' voters are overridden by other States' voters. They already have to suck it up when Senators from Delaware and North Dakota dab on 'em.