I think the rav should invite him for a Shabbos meal, and talk to him about it after dinner, after sending the family out of the room.
No should be excluded from davening in shul if he sincerely wants to daven. If he is just a leitz, looking to disturb people, which is not the case here, then there is room for debate on the issue. If he is doing things that prevent others from focusing on davening, he should be spoken to in a friendly manner when he is not going to be defensive, as he would be in the shul./ A smart rov should be able to think of a tactful way to convey this to him. And if not, then perhaps the rov should give a drosha in Shul on the proper derech eretz for the Kehillah.