I so wanted to love the show and part of me does, but the treatment of the companions has been a deal-breaker for me.
Nearly every companion arc ends horribly and to me, for no other reason than gratification of the show-runner. Rose is trapped, Donna had entire years of her life erased, Amy and Rory were sacrificed, Clara as well (essentially - but definitely Danny, now that I think about that arc), and also Bill. Martha somehow managed to survive and then there's Jack, but Jack was immortal before he met The Doctor. Just… sours the rest of it for me.
Perhaps 13 will be better.