OH and yes, the post Clara era of Capaldi was indeed a step down for sure... But as I said I would put the “Heaven Sent” episode as one of the better episodes since the reboot.
Billy Potts was without exception the most unrelatable companion of the reboot era to that point, at least for me. It seems like they just seem to want to ignore the formula that has made them a 6+ decades staple.
I did not watch Season 10. Going from Clara to Bill was literal torture.