Without further ado:
Maru: Multitasking, late-game
Serral: Scouting
Reynor: Creep-spread/counter-attacking
Clem: Reaper control
Byun: Control over drops with 2 or less medivacs
Cure: Control over drops with more than 2 medivacs
Rogue: Bo7 series planning
Gumiho: Mech play
Innovation: Timing pushes
Dark: Roach/Ravager control
herO: Gateway play
That's what I'm starting with, but there have to be so many more. What is it that makes MaxPax so darn good? Who has the best muta control out there right now? Et cetera, et cetera. I'm looking forward to seeing what you guys have to say.