Where The Maze Runner was a decent B movie, The Scorch Trials doesn't quite get there. What dialogue there is is trite and despite having spent two movie with many of the main characters, we still don't really know anything about them. Lili Taylor is wasted in a small role, while Giancarlo Esposito at least looks like he's enjoying blowing shit up.
Production on the third movie in the series is on indefinite hold, following a stunt accident that injured star Dylan O'Brien fairly severely: concussion and broken bones in his face but not life-threatening. I'd like to hope the extra time will allow the production team to up their game a bit for the final installment but I'm not hopeful: well-rounded characters uttering meaningful dialogue is probably not going to happen at this point - so if what you like is running and shouting, you'll likely be in luck.