A pretty consistent issue with England is trying to get players to play a certain way that we've hypothesised as the best, rather than building a gameplan/playstyle around the players we have
We had great success with prime Binny at 8 and prime Manu in the centres and have been chasing that high ever since
Look how good Itoje looks now, compared to last season when a journo leaked that he'd been told by SB not to play his natural game and just hit rucks instead,
Tom Curry worked massively on his carrying and turned into a real threat ball in hand - during the world cup he was barely given the ball, just told to tackle and hit rucks
I don't doubt that Borthwick's coaching style could work very well, but only if he's got the players to match his spreadsheets rather than the other way round.
I bet he'd do well coaching someone like South Africa, but England aren't South Africa and our best/in form players aren't that kind of style of player