As really wrong and morbid as it sounds, and not to take anything away from any loss of life, I hope that this was due to some pilot error.
I say this because I think the EJets series is a phenomenal series of aircraft, and this happens to be the first major (read: casualty) incident of not only the E190, but that entire series. I hope it was some sort of weather related or pilot error, otherwise what happened here may affect the entire series of EJets.