The former Morelia and Atlas coach believes Miguel Herrera won't be able to get El Tri out of the World Cup group stage.
"What I can say is that this new (Herrera) project won't be enough to get past the group stage," Boy told ESPN on Wednesday. "The level is infinitely superior (than the World Cup playoff against New Zealand)."
Boy went on to stress that New Zealand was a weak side with no real aspiration of being at the World Cup and that it would be "absurd" to carry out an analysis of Mexico's World Cup chances based solely on the playoff.
The Tigres legend and former Mexico international added that he would naturally be interested in taking over the national team if the Liga MX owners and the Mexican soccer federation were having doubts over Herrera.
"Who wouldn't like to be manager of the national team?" asked Boy. "It doesn't depend on me, but I'm raising my hand. The project that is currently in place will have the same time (to prepare) as others."
"What needs to be analyzed is if (Herrera's) proposal is good enough, or if it is better to look for something new."
Boy is a straight-talking and well-respected coach in Mexico, but has yet to win the domestic first division title.