@Saddleworth2 - I think that this is worth discussing
I think that this article suggests the focus of 2020 from Johnson's and Cumming's POV and highlights why it is not in their/the UK's interests to allow the EU to push agreement on a future TA into the long grass of long/repeated extensions.
https://blogs.lse.ac.uk/brexit/2019/12/31/no-deal-is-still-on-the-table-simon-hix-on-brexit-in-2020/
If looked at from the UK perspective it is so obvious why extensions beyond 2020 must be resisted unless it is to undertake the fine-tuning of a framework that has agreed all key principles.
Also, the WA and in particular the PD, are still loaded with constraints on the UK that secure the control of the EU over the UK and it might take the risk of a No-Deal to have these unpicked as this would be more 'efficiently' and politically acceptably done in that environment rather than have reopened the WA/PD.
I particularly agree with the view that:
".....if we’re heading for a no-deal Brexit, it would be better to get that out of the way soon (in December 2020 rather than December 2022), so that there is plenty of time to tackle the hit on the likely British economy and public finances before the next election, which is likely to be some time in 2024."
For me the good call is to develop what would be a pragmatic TA and one that
'should be' acceptable to both sides - but does remove the unacceptable constraints in the PD - essentially do in reverse to the EU what they had intended, in 2018, to do to the UK with regards to the PD.
Then have this pragmatic TA placed before the EU by the end of 2020 within a climate where Brexit is not the lead story every day and the media and public are not obsessed with each clause and considering who has 'won' as there cannot be a jointly agreed outcome in that environment of win/lose.
At the same time, the government should have genuinely prepared for the management of a No-Deal outcome - such, should that become necessary, then any headline news items of 2024 are about the strength of the UK recovery following the past (2020/2021) poor behaviour of the EU - rather than ongoing and emerging bad news stories.
For me - if we see 2020 unfold along these lines it will be further proof that we have at last got professionals directing Brexit policies, backed up by commitment to making No-Deal a viable proposition and demonstration of the political will to use it