With my used profile being a source of contact for school and sporting teams and the kids, I'm now finding I'm not getting any notifications for all the groups and nonsense that fill my feed. I'm currently running engagement campaigns and still warming my profile. Should I start deleting all the fluff?

Yes, you can delete all the fluff. If you already use your real profile for school, kids, sporting teams, and are an active Facebook user, you don't have to do as much of the fluff warm-up. The fluff warm-up is to build activity as though you are a real person. If you are a real person, you don't need to do as much fluff. Now that you're on engagement campaigns, you can start removing the fluff.