Why not have both? I.e. directly elected MPs and PR. One way to do this would be to have 90% of the MPs elected in 3-6 member STV constituencies, with every ca

Why not have both? I.e. directly elected MPs and PR. One way to do this would be to have 90% of the MPs elected in 3-6 member STV constituencies, with every candidate belonging to a party list. Then total the number of 1st preferences each party list got, and allocate the remaining 10% of the seats to the parties to maximalise proportionality (e.g. by d'Hondt). The top-up candidates elected fro each party will by losing candidates from that party who got the highest vote share. That way, each party will get a number of MPs proportional to its total support, and the individual MPs elected will be the ones the voters most like. Choosing MPs by party lists means the MPs have to be loyal to the party, not the voters.