It’s a copycat league, if you prove that a particular route combo works then everyone else is going to use it too. The thing that separates a decent coordinator from a great one is two things, being detail-oriented and being strategic.
Details matter when it comes to play design, making sure your receivers are running very specific routes in order to manipulate the defenders is the difference between a massive play and an incompletion. One of the things that JT O’Sullivan talked about a lot is that other teams are trying to use the new Dolphins motion where Tyreek sprints out right before the play starts, but these other teams don’t do it as well because they don’t have a player who’s able to turn into their route while losing minimal speed like Tyreek can which ultimately makes the motion as effective as it is for the Fins. Great coordinators get the most out of their players through details like that.
Then on the strategy side of it, at some point you’ve seen a perfectly-timed screen pass where the defense is overcommitting and a play that should’ve gone for 3 yards goes for 30 instead. Knowing how the other team is feeling and taking advantage of that is huge.
This is a controversial one but I think there’s a solid chance that with all the people we need to extend next year, Deebo ends up somewhere else. For a lot of people I think that’s borderline sacrilegious but if Purdy continues to develop as a passer I think Kyle’s likely going to be moving away from the wideback concept that’s defined the past 4 years of Niners football.