One is currently injured and thats falcone, he hasn't practiced in a few months. Makes sense if kids were getting reps in his place. One might be getting moved to defensive end also. I know one other also had a minor injury during 7v7 and was being held out for a little. I haven't heard of kids being kicked out of their starting spots for favorites though. They're very deep at the skill positions this year, a lot of depth. Competition is healthy and if someone is playing better than someone then you start the kid thats better, every coach does that. Not sure coach k would just remove starters with no competition.
Stalker I believe coach K is running the defense this year. The defensive coordinator from last year isn't on the staff anymore, took a principal job in fox chapel. This years offense if healthy will consistently put up 40+ per game. They need to be good enough on defense to stop the other team from getting in that range. Shouldn't be too tough they have the talent to be good on defense we will see though. Special teams needs work too, last year it was awful on coverage and returns.