All things considered, I think it’s very clear that this was a deliberate ‘dive’.
Bowyer is not the sort of driver to just lose the rear out of a corner like that all on his own unless he was paying no attention at all. If it’s determined this was deliberate, then the most suitable punishment would be to disqualify the 39 car from the rest of the season. I don’t know if you can punish Truex for something he benefited from that he may not have had any involvement in.
As for Newman losing his place in the chase, that’s a tricky one. You could argue that the right thing to do would be to let Newman have the place instead of Truex, but, again, is it right to punish Truex for something he might not have had any knowledge of?
As far as the Chase system goes, I don’t mind it. Is it contrived and artificial? Sure. Does it suit NASCAR’s attitude of entertainment before racing ‘purity’? I think so. NASCAR drivers and teams seem to be quite content with the fact that they have lots of arbitrary rules and elements involved with their sport to try and spice things up for the fans (lucky dog passes, ‘invisibris’ cautions, the Chase system), and they really don’t seem to mind too much. I think if they are happy to put the NASCAR brand and the ‘show’ before the overall integrity of the actual competition on track, good for them. Who are we to judge?