I've said t before... if my first episode of Doctor Who had been, for example, Time Flight, I might never have watched it again. The first episode of Class was nowhere near as bad as that. I watched every episode of Class and found something to like in almost all of them, and a few were quite good overall. If this is the end, that's too bad, because the enemy the first series focused on was pretty lame, while the setup for what was supposed to come next was much more intriguing. But there were enough episodes that didn't revolve around that enemy to make it worthwhile.
But then, I also liked most of Torchwood. It had some solid episodes in its first two series, like "Adrift," which was downright excellent, and "Children of Earth" was, imho, among the all-rime best Doctor Who-related TV we've ever had.
It's all Doctor Who, so I watch all of it. If there are stinkers like "Time Flight" or "Kill the Moon" or a few parts of "Miracle Day" or "Brave-ish Heart," well, the good ones make up for them.