Well my use of Kadees is purely for the convenience of uncoupling and the ability to shunt stock to anywhere on the layout and just leave it there! The prototypical arguement does'nt even come into it... And you're right, the Kadees take a bit of perseverance to get them working consistantly.
Have you tried the Brian Kirby modification to the Bachy couplers? Before switching to Kadees I was experimenting with that method, and it works very well. Although you can't
shunt after uncoupling, it works beautifully.