Yeah, they seem to struggle to go away from sonic screwdriver, but I love some in-jokes they had for last three two seasons about Doctor waving it around, especially during 50th special LOL
As for Clara - I don't know...I am thorn about this. I actually liked that Clara got to reflect on insane way Doctor went for to save her....putting back and let her die as she wanted to might be best way to resolve, but I will guess they didn't want end on downer. I am not hating them for that...I guess that's something always many people will argue about.
As for Hell Bent it only occurred to me during last week what Doctor means by saying 'only THEN I remember' when opening doors with number 12. When I realized it is now very chilling and very feels moment for me. Moment he realizes he done this thousand times and he will keep dying billion times because he hates Time Lords for what he did to Clara and he wants them to 'resolve it'. I know Clara was a bit mixed bag for lot of fans, but damn that's awesome writing and story arch.