That article is subscription bait. There is much more to it than the article would suggest.
We know the deal with Jones. He doesn't like the target on the back that comes with being favourites, he likes the underdog status, and he has said on a number of occasions he doesn't want the squad peaking until the right time (WC 2023) as no team can continually maintain peak performance. The RFU have also been very clear in their annual reports and public statements that the overriding priority is WC 2023.
He's also looking for an edge, and he must, because we don't have the players and depth of SA, France, and arguably NZ. That edge could come from versatility and squad flexibility (particularly with ongoing Covid nonsense, injuries, etc.), surprise factor (bolters, new tactics, concealed playing structures and formations, and lots of 'noise' for other teams to work through), mental toughness, peak performance timing for WC 2023, and other factors.
The hybrid/total rugby mantra also plays very well into this strategy, as it has a short-term cost in terms of performance levels as players find feet in new positions, but long term gains with a view to WC 2023 (broader skills and generally raised ceiling for players, squad flexibility, etc.).
It all predicts under-performance between World Cups, especially mid-cycle, and that's exactly what we see with Eddie Jones' England.
Sandbagging isn't limited to F1, and there will be some amount of it going on at any one time in the Six Nations. Corporate sponsors won't allow broadsheets to labor too much on all that though. It's 'Rugby's Greatest Championship' after all, not just some sandpit for the world cup.
I do also question the shenanigans that go on sometimes, but I reckon England are generally in a good place with a view to WC 2023 personally.