Too much emphasis is given into "new ideas" in football. Football, the game, hasn't changed that much in decades, outside of superficial things like lighter balls, fitter players, minor rule changes, all of which have been gradual and across the board. The big ideas tend to be cyclical. I can't think of 1 genuine difference someone has made that has made me go "wow, I've never seen this before". Sam Allardyce was at the forefront of introducing technology into the Premier league 20 years ago to try and give his Bolton side a minor edge against his wealthier competition, but he has also regularly been considered a dinosaur for sticking with his belief that being direct can be a leveller against more technical players, teams and systems. The basic principles are the same though. You set up your team to be the best that they can be with the personel you have.