In a few lakes in Connecticut, they decided about 20 years ago that they "needed" to introduce Walleye into the water. I'm not 100% sure as to their logic, but I think it was basically just to add a new species for people to catch locally.
Well, at least two of those lakes are fairly close to me and they are lakes I used to fish regularly. One of them was my favorite lake to night fish for bass. The other was up in my top three for night fishing also. And now one of them is a lake I will not go and fish unless we have a tournament there, and the quality of the bass fishing in the other lake has declined badly also.
CT DEP hasn't had much too say about this. But in my opinion they destroyed two very high quality bass fisheries for a fish species that nobody really wanted or asked for. And sadly, it will probably never go back to the way it was.
I hope they don't add any new lakes to their list of lakes that "need more diversity" in species available to anglers.