If you are referring to the $1M+ a year that Kroger is paying for the naming rights, that is a deal between Kroger and JMI (UK media partner). UK and JMI came to a new agreement several years ago, which had Commonwealth naming rights in the agreement, worth $210M over 15 years and came with a $29M signing bonus. This money helped pay for many things, including the new football training facility.
I don't know how much UK higher-ups valued the name "Commonwealth", but if giving up that name was part of what got us the money to build that new, state-of-the-art training facility for the football team, I think it's well worth it in terms of football recruiting and performance.
People will complain (people always complain), but in a year or two this practice will be far more common and we will all know Kroger Field as "the K" or some other nickname or just call it Commonwealth. And I bet I barely notice the Kroger logo's on the field by the third home game of the year (yes, I'll be at all of them).
OK, one more comment and then I will drop it.
If the agreement with JMI gave them the unfettered right to make UK do anything they asked, then yes, it was a bad deal. If it provides they can change the school mascot, the school colors, the fight song, and make us play half our games at midnight on Wednesday, then yes, it was a really bad deal. Money should not drive every decision, especially in college athletics. But surely we have some reasonable veto power, and if UK does, then they should not have changed the name of Commonwealth Stadium.
P.S. to Robo222, no, the Board of Trustees has never nay said a single decision laid on their table in my memory. Joseph Stalin got more push back from the Politburo than the AD gets at UK.