I tightened the tilt bolts in my column, added the bearing-type seal at the end of the column where the intermediate shaft meets, have a tight jeep intermediate shaft, installed a rebuilt quick ratio steering box, new tie rods, new center link, new ball joints, everything. And I still have some slight play in my steering. Its definitely less than what it was with all the old worn out stuff but its there. Its hard to say which of those things made the difference but there is one. I minimized the play, as 69hurstolds mentioned, but at this point I doubt itll go away. I do like the jeep shaft upgrade but dont think its the sole reason things have gotten better. If looking for a good upgrade, I'd say go with it and see how you feel with the changes. Nothing more than a few minutes swap back to the old shaft if its not what you expected.
Do you have any frame braces? I installed jounce braces last year and they really changed how the car feels.