Most sensible ones amongst us agree that HM government needs a functional and effective opposition. For the past 100 years or so His/Her Majesty's Most Loyal Opposition has been provided by Labour.
That is no longer the case, and even a grand coalition would not provide any opposition - that's where we are.
Labour is in disarray with a multiple three-way split of hard left, centre-left and centre and all their sub groups. It is currently going through the motions of selecting a new leader from an uninspiring bunch. Given all its capable MPs it would be hard to pick such a group of losers on a million to one bet, yet there they are, all sides fighting like rats in a sack for supremacy: but does it matter?
Given that the government has a majority of 80+ and opposition being no more than an academic exercise then Labour might as well get it out of the system... and then get it right.