Both are terrible terrible examples. Atletico playing negative football is a myth. In certain big games yes. Some of the technical players they have had over the years we could only dream of.
Leicester as well. Not negative. They fought fire with fire that seasson. The opposite of what an allardyce type team does.
Atletico play negative football with some great players. Think that's kind of my point. The football gets better depending on the squad. Dyche here (with a successful transfer window) would play much better football than dyche at Burnley. It's the players much more than the managers style that defines the standard.
Leicester and atletico are both defensive non possession teams. Who plays open football on their budgets with anything like their success.
I actually think it's easier to get results playing defensively. You can organise a defence brilliantly much easier than you can get 4 or 5 world class players on a budget