Oh yes, completely agreed. That's why I said it was the first time I regretted needing child actors. Bran has been completely faithful to my imagination, sparing as his use has been.
He has gotten more time than I thought he would seeing as how this show is adult oriented and Arya is more popular. Though Isaac has given a boost to the popularity of the character just because he is so adorable. Another thing is that he has been given limited minutes but those minutes have been used very effectively. I love his interactions with Maester Luwin.