Board Thread:Episode Discussion/@comment-24993958-20181026055523/@comment-37320542-20181031200931

Also, about the turrets, Oscar actually said it best since the gang wanted to lure the Grimm to the back, but since the turrets were set up all over the train, including where the other passengers were, the Grimm were spreading out to take care of the turrets, putting them near the passengers and thus putting the passengers in danger. This would consequently make the team's job harder since they'd too have to spread out their defense from the Manticore and Sphinx pack.

Also, I view the manticores going down relatively easy to not be a sign of their weakness but rather a sign that the group had gotten stronger. Oscar, a relative beginner was struggling one-on-one with a single Manticore after all.