I personally think Bundy has the highest ceiling on your list with "Jake Arrietta in-his-prime", ACE potential. I don't feel the same way about Nelson and assuming he will return to his 2016 form could be fools play. I think besides Bundy, Freddy P has the next highest ceiling on your list, IMO. I love Burnes but that's not because of his ceiling, but instead because of his high floor. I think he'll be a solid #2-#3 starter with a long career. Because of that, I really don't want the Brewers to trade him. In the last 3+ decades, the Brewers have developed as many players like that that you can count on one hand!