tezzer hello,
Nice of you to point out to the cc about these pax. I thing they handled the issue correctly since the gentleman in question created no hazard to other pax but the lady travelling with him. I seem to recall crew stating that it is a good idea not to cut off completely the supply of Booze as not to enrage the pax. And at the end of the day what happends between a couple (sort of a murder) is not our business - in most cases.
I think you did your duty as you felt fit and you can let the case rest.
Rwy in Sight