Good stuff there. Another opportunity is to focus on the playability of greenside bunkers over fairway bunkers. Golfers get grumpiest when they aren't able to get under the ball in a greenside trap, but firm almost hardpan bunkers are preferable when playing a full shot. So there is much less need to fluff and add sand to fairway bunkers, which tend to be larger as well. Leave them hardpan-y. A slightly fat shot is still punished, so is a thin shot that catches the face/lip, and you are still out of position and in a hole essentially.
The article fails to mention bunker drainage, which is basically the root of all evils in bunker maintenance. Bunkers can drain poorly for a number of reasons, blown liners, clogged lines, compaction, contamination etc. If a bunker drains poorly then it will never play well consistently, period. Short of digging the whole thing up and renovating, your only recourse is to constantly add sand, and constantly rake by hand. But you are just burying the problem.