Marc
I think the bunker looks alright, however, does the "added penalty" justify the added cost? Does the bunker increase the strategy of the hole? As an aside, I think a better idea is to keep the grass in front of the mounds and the mounds themselves short. The ball either has enough guts to roll through or it will kick left to an uncertain lie.
Troy
If you make fairway hollows deep they are a severe penalty because deep ones often require short irons to get out of. Go play Huntercombe, I tell ya, you don't want to be in most of those hollows! Also, even shallow hollows can be very effective near greens when that shot plays downhill and/or downwind. The player doesn't get nearly the spin as out of a bunker and it still takes great skill to play good shots.
Ciao