I have really struggled to engage with this season. I'd had such high hopes for it as well. Ncuti has been quite good like I thought he would be, Gibson has been great too, but they've not been served well by RTD at all, and I realised what the issue the first half of Saturday's episode - the tone change. It felt very much like a CBBC/SG1 vibe which is such a shift for the show from what the audience had had before. I appreciate that he decided to pivot directly to appeal to younger viewers but that seems to have alienated a lot of older/longer term fans.
The twist at the end was really good however, and hopefully the tone of the show before was just to give people a false sense of security and that things will improve from now on.