Boice once critiqued the general thought that if a man is a bad pastor, he gets a small church; if he is good, he gets a large church, and if he is absolutely exceptional, he teaches in a seminary. He thought instead that the church should be sending its best men into the church. The people of God are being destroyed from lack of knowledge. There might be one or two churches that are too intellectual, and too concerned about minutia of the Bible, with no concern about applying the text in their lives, but those churches are few and far between. The VAST majority of churches in the west don't even have biblical preaching at all. What needs to be recovered is the firm understanding of the Bible preached and taught properly (and if it is so preached and taught, it WILL be practical!). We need pastor-scholars. We need pastors who can rightly divide the Word of truth. Every pastor should be looking to improve his understanding of the Bible constantly. In a way, then, I think it is unhelpful to set the scholar over and against the pastor. The pastor should be quite learned in all things biblical, precisely to be able to explain things in a simple and clear way to all the congregants. It takes quite a level of scholarship to be able to do that without dumbing down the material.
As for Heiser, Jacob and I have tangled on him before. I do not trust Heiser. His methodology is unsound (especially when it comes to the intersection of biblical and systematic theology), and his arrogance places him over and against the church in particular, on interpretive issues. I do not agree with his main conclusions on the heavenly council.