If I could eliminate one word in the English language it would be “unpack”. I have heard this word used countless times in conversations where you’re going to try to explain something,,,to dissect it. It’s closely related to the term “deep dive.” If you’re going in-depth with a topic, you’re taking a deep dive and like “unpack,” I think this is something we can well do without.
David Lee 
I haven’t actually heard “unpack” used in this context, but I would definitely agree with you. “Explain” works just fine.