I don't think the series finale was great, it was fine but I don't think I'd rank it as one of the best episodes of the show. Overall, season 4 wrapped things up in a satisfactory way, albeit somewhat predictable, which was fine. It was a little bit all over the place at time (the whole corporate intrigue isn't that great in this season), but it also hit some incredible heights with Logan's death episode, and the funeral one. The election night episode was good too, but it felt a bit too ridiculous, to an extent - but maybe it's actually closer to reality than I realise. Still a very good episode, mind.
Overall a great show, not sure where I'd rank it in my favourites, a little bit behind my absolute favourites but quite high nonetheless.