Respectfully, CT will never allow it unless the people or fed.gov manage to tell them to buzz off. Which aren't like to happen.
It's a little-known fact that Connecticut
law already allows open (licensed) carry. I count a Connecticut permit among the several I have for the northeastern states. The license itself says it is a "Permit to carry pistols and revolvers." Nothing on the permit or the application says anything about "concealed." And nothing in the relevant statutes says anything about concealed. The law says only that you must have a permit to carry a pistol or revolver.
The confusion arises, I am told, because Connecticut has an anachronistic agency called the Board of Firearms Examiners, and that board has put out an advisory brochure in which they pose the question of whether one can carry a handgun unconcealed, and they
suggest that "mature behavior suggests that handguns should be carried concealed." I have also been told, but I have no way on confirming from afar, that the Connecticut State Police Training Academy incorrectly teaches officer cadets that open carry is unlawful -- even though it isn't.