I still think it wasnt that bad. It just never figured out what kind of show it was meant to be, sometimes it felt like a YA sequel to SJA, sometimes a YA Torchwood and the swings from one to the othe could be quite violent.
I think at the time I said it either had to be more or less Doctor Who to work, still seems about right. A few of the later episodes are genuinely good though.
Toning down the "adult content" a bit and it probably would have done okay in the old 6pm BBC2 slot.
I only saw the first two episodes, they were enough to put me off watching any more of it. I think I understand what they were going for in general - I think that the intent was to aim at the upper end of the "young adult" marketing demographic, but it did feel like it was a but shotgun in terms of trying to find its target. It was the second episode where I really felt they didn't stick the landing properly. The first episode suffered from having Doctor Who in it, as soon has he arrived it went from "Dark Season with every second light-bulb missing" to "trying not to slip down to rentaghost" territory. The second clearly intended to say something about PTSD but lost track of its point and counted stick the landing at all.
For me Class ends up in the "Mortal Instruments"/Divergent/Maze Runner end of its marketing demographic, rather than the more competent "Nerve" end of the scale.
It's belated cancellation feels rather like they left calling T.O.D till they'd pretty much wheeled the body in front of the Coroner though.