Honestly, they can't win with that map pool. Vertigo is perma ban, Train is really bad. They only pick Inferno (which they often lose), Nuke (they're bad on ct side), Mirage, Dust2 (hit or miss) and not often overpass.
I hope they will train Ancient or Vertigo
Even if you don't like those teams, complexity, ence, g2 don't have a perma ban.