That's a long lunch 3Ts is having (well, it is Friday) :-)
" the last three years have been shaped massively -- dominated, even -- by the result of 2016."
Only by what our Parliament has been discussing and what's been on the telly. As with much wind and puff than emanates from the bowels of Westminster, all that's happened is the matter has been kicked into the long grass (like almost every other significant decision those august creatures have been called upon to make). Nothing of any significance has actually happened, but MPs don't measure their work rate by results, only by "activity". There has been no "shaping" of the UK's relationship with the EU, which after all was what the referendum was all about.