I am reading Dreher’s book and I agree with you, I respect his reasons for leaving, and think he may regret having left. Coren, holding the beliefs he does, was NEVER in communion with the Church, so all for the best that he left it.
I suppose it does not violate the RF ban on “mind reading another poster” to mind read an author. Dreher has written more than enough to find some basis for this “regret” speculation.