I've never had a problem with the caveman approach when necessary. Away to Germany? Yep, put as many people behind the ball as possible and hoof it all night - it's our best chance of a result.
My issue when we adopt that same approach against teams who don't merit it, and when it isn't our best chance of a result. There'n no need to concede territory and possession to Georgia at home, but we did it anyway.
Different teams present different challenges, and need to be prepared for differently. A manager who has one way of playing regardless of the opposition isn't doing their job properly.