Get rid of the Heavy being categorized as a "Dimwit".
Explain how the Heavy's PhD in Russian literature, rather wide knowledge of weaponry, and his handling of his household qualify him as a dimwit. The only reason anyone has ever called him dumb is because they have a prejudice for him not being fully fluent in English. Seriously, the only, ONLY justification I have ever heard to anyone saying he's dimwitted is just because he's not fluent in English.
You're meaning to tell me that the Heavy's intellect is comparable to that of the Soldier? Get out of town.