New thesis: Boris is going to be just fine.
He is an entitled bastard with no sense of responsibility, but he is made of Teflon.
He has a crony press in his pocket to gloss over his mistakes, distract attention from him when needed, and paint him as a jolly old fellow.
He implies so much, but without outright lying, that he is untouchable.
He is going to come out of this smelling of roses: lie low long enough for things to settle down, and step in to play the affable clown just right, just when it's time.
Quite probably as the next PM.
I've just been going over his Telegraph article, and realised that the slithery bastard never outright lies in it. For example, when he said he would get access to the single market without oversight by the European Court of Justice, he was right:
"The only change – and it will not come in any great rush – is that the UK will extricate itself from the EU’s extraordinary and opaque system of legislation: the vast and growing corpus of law enacted by a European Court of Justice from which there can be no appeal".
The country would be part of the EEA system. In the EEA, it's the EFTA Court that is the supranational judicial body. The EFTA Court is just as supranational and just as unappealable on matters of single market legislation, but it is not, technically, the European Court of Justice.
And once the blustering has died down from the angered 27, everyone knows that the best deal all round is EEA membership. It solves the Scotland and NI question, preserves all the trade deals, etc. All that PM Boris needs to do is ask for a cap on migration, which Switzerland has also asked for, so there's precedent (...Switzerland's request has not been granted yet, but whatever.) It's going to be the only point that actually needs to be negotiated, and some suitable EU fudge will be found, as per.
And Boris is going to be able to say that he fulfilled his mandate.