The more we say 'overtraining', the more reps A'halo will add to his shoulder regimen.. That's his stubborn nature.
I can't help but to like A-halo, but you're right.
IMHO, a proper shoulder routine doesn't need tons of volume. If you've not stimulated the fuck out of your front delts from training pecs with flats and/or inclines, you've obviously pulled a Jenova and done something terribly wrong

Medial delts = high pulls, some manner of lateral raises. Rear delts -- lots of face pulls, rear delt machine shit and ultra wide-grip BB rows to the chest. Work in some John Meadows stuff and a weekly session of Reeves deads and your shoulders won't suck for long.
Increased training frequency will help to a point, but as a rule of thumb, the more often you train a bodypart, the fewer to-failure sets you should do (IMO). In other words, if you can do DB presses with a pair of 110s and fail at the 8 rep mark, stop at six reps.
Hope that helps at least a little.