On Perich - just a note of caution.
Perich did not enroll early. He stayed in HS to compete in basketball and track. and he sustained an injury at the end of the track season.
meaning - he enrolled later than many incoming FR and he also had to rehab an injury before he could really get into football workouts. He is also behind others in learning the playbook, schemes, etc.
so unless he is an absolute phenom, he is probably not going to play much at the start of the season. maybe get some work returning kicks, or get worked into a couple of packages on defense.
but he will have to be truly head and shoulders above the rest of the position group in order to get any significant playing time on defense - at least for the first half of the season.