As you’ve said I think fans, managers and players would be more accepting if it was done as part of a consistent application of the rules, but as we’ve seen with refereeing just this season, the quality ranges from dire to barely capable.
They would - so to get Labour into ‘power’ they are going to have to form some kind of progress alliance with the SNP, Greens, PC and probably even LD, and a proper strategy of standing down candidates based on the make-up of the individual seats.
The main opposition party won’t support PR though, which is ironic seeing as they haven’t got a cat in hells chance of winning a majority outright under FPTP.