I finished the game and I'm somehow conflicted. Best thing about it was the atmosphere, it really transported you to the UK, but 2 of the 3 storylines were a bit meh (the 2 father ones was the clear standout) and none of the choices really mattered (like it was also the case in most Telltale games) until the very end. Also most of the gameplay was a bit of a slog. I did like the final chapter though.
Maybe they could've done 3 chapters + the "final" chapter + 3 more chapters, that would continue the storyline after what happened in the "final" one, and that could vary widly depending on the choices taken. That way you minimize the bad storylines, explore the mistery and give meaningful results to the choices taken. Or 4+1+2.