“The Face of the Franchise” aka Isaiah McKenzie has become a favorite of Bills Mafia over the years. The seven-year pro “earned” that title with his interactions on social media, national television appearances plus 11 catches for 125 yards, and a touchdown in a 33-21 win versus the Buffalo Bills’ most hated opponent last season. Outside of that performance against the Patriots, Lil’ Dirty has been rather pedestrian with 797 yards and six touchdowns on 88 receptions through his first half dozen seasons in the league. If wide receiver Isaiah McKenzie is going to be the late bloomer that Buffalo football botanists believe he can grow into, three questions need to be answered: Opportunity This question is extremely easy to answer because there are two huge departures in slot receiver Cole Beasley and wideout Emmanuel Sanders. The duo not only bumps McKenzie up the depth chart but also leaves behind 184 targets which they turned into 124 catches for over 1,300 yards and five touchdowns. Those vacated targets are over seven times more than McKenzie saw a season ago. Their departure also frees up 1,438 snaps for McKenzie and company. If Isaiah can earn just 20 percent of those, his…