I agree with Elizabeth that this is certainly an advanced language skill that would be taught in higher proficiency levels, mainly in conjunction with intercultural communication. However, for lower levels, it is essential to become conversational and what we sometimes call 'operational', i.e. be able to get things done and interact with others on a daily basis. In cultures that highly value implicit communication, learning how to get the message across more indirectly or subtly might put this skill higher on the curriculum, however, since the United States is mainly characterized by explicit communication, ESL students won't need that skill at a basic level to get by in daily life. Assertive vs. diplomatic language, or how to give negative feedback more indirectly in a business situation is something I only teach to very advanced speakers of English, in intercultural clsses, and in business English classes, but certainly not in beginner and intermediate ESL classes.
Why should mitigation be taught in ESL classrooms?
Mitigation is a worldwide technique used to soften or indirectly say an otherwise direct statement. It is most commonly used in situations where one person is a subordinate to another. However, most ESL speaking classes don't address this topic and I find it essential for most ESL learners.
2 Answers By Expert Tutors

Elizabeth B. answered 07/25/19
Certified Public School Teacher with 22 years experience
It would be a technique that could only be used by Advanced or Advanced High students. (Those are the classifications we use for our Texas English Language Proficiency Assessment Systems (TELPAS) students in our public schools.) I know many native English speakers whom I would not classify Advanced High. I'm curious as to why you consider this such a vital skill.
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