The biggest quandary is what will work for two thirds of the UK may not work for the other third.
IMHO, this is the key point (though I think the threshold is somewhere around 80% now).
In today's Infrastructure Report (whatever they changed the name to, alongside dumbing down the actual content), one main headline was "The focus should now be on delivering better broadband to all, so everyone can benefit".
If Ofcom truly want to act as the consumer's friend
for rural consumers (ie the "everyone" that still needs to benefit) then they need to stop acting in a way that focuses on "cheapest". If they continue down that avenue, then they are only acting on behalf of the ones who live in competitive areas.
If there's a split coming, I can only think that it has to work in two completely ways, for two completely different markets.
Perhaps one arm of Openreach would be meant to work with Sky and TT against VM (as the other infrastructure owner), while the other needs to work with altnets in a supportive way, perhaps almost charitable.