Not sure this is true anymore. Pulis this year was unable to rely on his traditional "field six centrebacks and nick one off a set piece" schtick. I think the average talent and coaching level in the league is now high enough that you have to be better than that.To be fair, Pulis and fat Sam guarantee at least 17th place. Fuck knows why they hire Pardew though
You need a coach with enough tactical nous to be able to defend in a functioning system, and then attack in an organized way as well. Some players/dressing rooms may resist this a bit (ie Palace under de Boer), but I think the reality is you can't fake it anymore in the PL.