Cubs fans had various frustrations regarding the Tucker situation. First, that he wasn't productive after the first couple of months. Second that the Cubs made no effort to make a competitive extension offer. Third, that they trade Cam Smith for a one-year rental.
Smith is a young guy, still only 23, with lots of years ahead of him, so he may blossom into a star in time. We've seen PCA improve in unbelievable ways, may Smith will do that over the years ahead.
But thus far, he's not really been that hot. .671 OPS last year, .687 this year, with sub-.300 OBP. Trading for a rental would burn a lot worse if the guy you traded blossoms into a star. May still happen, but not so far.