As I have changed more into taking my honey off earlier, and then doing summer splits, I have found the queen excluder more helpful than in the past. I do not like going out to yards to take off supers and finding the queen with a layed pattern straight up the middle of three or four supers.
I also find that using them with an entrance above the excluder, and turning the excluder sideways, eliminates about every gripe people have in using them.
For me, it also matters as to whether a queen lays in the supers. I suppose those using chrystals and moth balls, it's all the same. But I know if I keep the supers void of cocoons, the wax moths will almost never do much damage.
I've seen hives that died and the way moths destroyed the bottom two boxes, and the supers almost untouched. Yes, they will eventually work them, but I have saved many boxes of honey super comb for the fact the wax moth larvae did not prefer them.
I can stack up or lay on end, supers of clean wax, and almost no damage will be seen. Supers that have has brood raised, will need protecting.