It seems like a series of fine lines, Don. Why was an awkward natural feature left as a compromise to conventional golf? If it was done for efficiency of construction, with a due amount of consideration to how much the feature would force 'unconventional golf' and the answer is somewhat, or sometimes, or if desirable golf shots are not made and a quirky penalty is levied, then I think it is OK.
If quirk is left behind from a compromise with the golf game's conventionality, and always results in odd, unconventional, penalty sort of circumstances, or even most often yields those odd results, then I don't think it is acceptable, and the design should have been altered, or rerouted to avoid that sort of constant quirky circumstance.
If a quirk is totally manufactured for no particular reason of necessity to compromise with the land, and only to inject novelty, or penalty, then I think it is merely mini-golf, amatuerish design.