I find that small-c consequentialism is a huge step up from operating on impulse, but "deontological injuctions" are good to special case expensive and tricky situations.

However, most of the good deontological injunctions that I know of are phrased like "don't do X, because Z will happen instead of the naive Y", which is explicitly about consequences and expectations. Likewise for "don't do X, because the conclusion that X is right is most likely caused by an error".

The difference is more between cacheing and recomputing than between deontology and consequentialism.

Actually, I don't even know what the moral theory "Consequentialism" means...