Hot spots tend to occur more often with shoes that do not have especially stiff or sufficiently thick soles. Keep in mind, however, extremely stiff soles can cause other foot discomfort in some people. I've three pair of road shoes that I've accumulated over the years. One is some form of plastic with a pretty stiff and thick sole. I find it very comfortable. Another is a pair with moderately thin carbon soles. This too is comfortable. The thrid pair are also carbon soles with but much thicker soles. If I wear this for more than an hour, I get cramps on the bottom of my feet. From what you describe you probably need a shoe with a slightly stiffer sole.