The more I think about it, the more it seems like a no-brainer to chop Mac and Ox and insert Marion's husband while retaining Mutt. Keep it in the family and get the audience MUCH more involved in the characters. Let them feel a little disappointed that Indy is not "with" Marion while the two of them share their classic, sizzling love/hate dialogue.
Even with Mutt's watery eyes, I never care much that Ox went crazy. But it would rile me up a bit to see Marion with another man (even though Indy was the one who left her). I'd really feel for him and his lonely state, especially given his age. While this may sound a little too dark/deep for this tone of this film, it could have been played--as I said before--with a lot of humor.
Even with Mutt's watery eyes, I never care much that Ox went crazy. But it would rile me up a bit to see Marion with another man (even though Indy was the one who left her). I'd really feel for him and his lonely state, especially given his age. While this may sound a little too dark/deep for this tone of this film, it could have been played--as I said before--with a lot of humor.