Estevez, is a decent striker, in the past year he has produced quite a few quality performances. Above, anything, Estevez has very good pace that is combined with decent to good shooting skills. This season he has scored 6 goals in 18 matches.
At the very least he would be good enough to claim a place on the substitutes bench. I could also see him being used in a rotation system. All things considered I think that he would be good enough for FC Porto.