"Consensus Politics" sounds great, on paper but the reality ends up being "you scratch my back, I'll scratch yours", tail wagging the dog and all that.
What would really impress the electorate (well, me, at least) is if sufficient numbers of the second place party would evade the party whip and vote through government motions which they can either tolerate or even partially agree with, in such a way as to deny the nationalist groups the leverage they seek.
Of course the neon "This Never Happens" sign will be flashing at this point because ideological differences make that unlikely - it's what parliament is all about, after all. But refusal to cooperate, specifically in order to get what you want, from the position of numerical inferiority is, in essence, childish behaviour. Preventing the nationalists getting their way, if that involves harming the nation, therefore becomes admirable, even though spoiling their aims is on the same level. To neutralise 80-odd SNP/DUP/PC/Other only requires half that number, plus one, Labour to vote 'aye', each time.
To my mind, it is a pity that election day majorities are not turned into block votes on individual bills. The existing system of "pairing off" means that a majority of 27 can pair off with a majority of 7,000 such that neither MP has to show their face at the debate. Whether they spend the day on their constituents or go to the golf course is neither here nor there. Block votes would make it important *who* fails to attend and/or vote according to constituents' instructions rather than the party whip.