Not sure Mzungu and Callinan are that big a blow to peoples teams in the grand scheme of things. They are both such cheap and obvious buys that 99% of teams will have them, and therefore by buying them you don't have a chance of actually benefitting from them, but rather it just ensures you don't fall behind (does that make sense?). Dyson Heppel and David Swallow are two other obvious examples.