Good movie. I'm not sure I would watch it again, though. The movie had a great cast, but Cena's acting is seriously lacking and I expected more from Capaldi - though that just could've been the error of the writing staff. The plot was pretty hokey, but I suppose that is the point of this sort of genre.
(Spoilers) I enjoyed the gore and the camera work. I, too, came around to Sebastian by the end. I was pretty disappointed at how quickly Savant was dismissed. I invested in his character already, early on, and wanted to see him grow and outwit the system. I totally knew Weasel was okay and loved his bit at the end. I did enjoy the massacre at the start of the film, otherwise.
Overall, better than the other Suicide Squad film. So glad Leto did not make an appearance.