They will be really fun until about the last 10 matches, when their legs will give out. Bielsa has been doing the same thing for 30 years. His Newell's teams were doing it in the early 90s. Mauricio Pochettino was a defender on those sides.
Sanchez is the same player he was with Nacional. You can't teach 6'5" but he still doesn't play long balls well and holds onto it too long in front of goal.
Regardless, I support him.