Hernandez is not slow and is only 25. I think if RDM has identified him and Ayew to play up top with McCormack in behind there could be some fun games coming. Add in Grealish, Green, Traore and Gestede we should have the firepower to get up.
Kodjia looks a decent backup plan, but I am sure some decent scouting could find a Kodjia, or Hernandez for that matter, for half the price in Europe.