Finished recently to watch season 5. Meh, what a clusterfuck.
Before watching it (I didn't start until the Kevin Spacey scandal) I was a bit sad that the series had to end this way, now after having watched it I'd say "well, about time they finish it".
The change of the writing team it showed very clearly, the storylines were all contrived and made no sense. As pointed above, one episode they go "One nation Underwood", stating the election years for almost decades to come, and then Frank goes "Nah, I'll kick myself out of an elected presidency a month after having finally got it"
Also: What's in the world of the show the appeal of Frank Underwood? He's as shady as it can be, he didn't really accomplish anything except the America Works program. Maybe it could have been interesting to have a Palpatine approach, to present a wolf in sheep's clothing and having him beloved doing nice things, while being a relentless blackmailer behind closed doors.
Really, Kevin Spacey Spacey-ing all over the place was the main and essentially only draw of this show (See the scene in which he announces his resignation), without him the last season will be even poorer than the last.
Another detail - I've read a comment on the web how 13 episodes for 4 seasons make 52 episodes, and 52 is the numer of cards in a deck. Now that I've read it, I'll forever regret the series didn't end with Season 4, it should have been two season of rise (the final scene of Season 2 is the best of the series for me, it's almost satisfying as a series finale), one season of uncertainty and the final season of fall. Damn, "House of Cards" literally means "Something that takes a long time to build and comes down very quickly", take the hint from the name of the show, showrunners.