These two episodes together were an overall disappointment. The Hell Bent episode was stylistically too similar to Moffatt's show Sherlock - the extremely fast talking to make it impossible to question the logic of what was being dumped; and all the quick cutting. They could have shown millions of years had passed in more interesting ways than a repetitive Groundhog Day montage.
Heaven Sent started out promising with the War Doctor back on Gallifrey stuff, but once it came back to Clara and the Doctor cheating her death I was shaking my head. Why Moffatt??? Then having Clara give the big speech about her last heartbeat and wanting to die properly, etc, only to have Clara decide to cheat her death and go off with Ishielde?
Although it was totally unnecessary to the story, I liked seeing the Doctor in the diner post-memory wipe. But it reminded me just how weak this 2-parter was in comparison to that excellent one.
Schrodinger's Clara. Dead or alive, the Clara companion needs to never return to this show though.