In 2017, MLB’s most recent collective bargaining agreement went into effect, covering the 2017 through 2021 seasons. One of the key points of the new CBA was the way in which it would change the qualifying offer system. Players likely wanted the system done away with, as the qualifying offer can lower salaries, while teams, especially smaller market ones, prefer it as a way to recoup value when players leave.
Instead of doing away with the qualifying offer, the CBA overhauled the system into a new, entirely arcane process. How the qualifying offer works depends on several different factors regarding both the player in question as well as the teams involved.