For the ambassadorship to Israel. Ol Huck has been out of the news for a long time now but Trump wants him in the administration. I’m sure he will do a good job but the Palestinians probably don’t like this since his viewpoints are well known on that subject.
They tend to make recommendations for policy to the CINC and state staff. Since they live in the country they are ambassador to for long periods they tend gain a lot of knowledge on policy ideas relative to that country.