Odorizzi is a good choice. He has the stuff to be an absolute stud. The problem is that he's a high school player, so the Crew will move him along slowly and limit his innings.
Frederickson just has too many control issues. If he can figure it out, you could be right, but it's only gotten worse as the year progresses.
My second half breakout player is Eric Farris. He started off slowly after coming off a hamstring injury, but he has all the skills to be an absolute monster. The second baseman won't wow you with power or speed. He is solid all around, however. Look for big things from him.