Back towards corners - good corners need delivery, practice and variety
At the moment it looks more like Brown has worried about fixing the defending/shape side first. Perhaps 15 minutes can be found per session once he’s fixed the lack of chance creation/shots.
England in the World Cup worked really well because a new set of routines only had to be used across a handful of games - no chance for the opposition to plan if it is only ever used once or twice. Put that into a league season and opposition scouts will have seen pretty much all of them by late August.
So more practice then?
I’d agree with the article on structural changes - how many times would a foul have been given against Shaun Taylor with an obstructing player put in to stop his run these days? Especially against a keeper. Certainly zonal and mixed marking systems have put bigger and better headers in better positions close to the near post. Most teams (not Brown though) put one of their top few headers there. We used to use Ranger and Obika.
Coaches do still obsess on corners though - just less PMO merchants and more hipster number guys
https://statsbomb.com/2017/02/changing-how-the-world-thinks-about-set-pieces/