My wife knew it was the finale coming up, I looked and saw nine episodes in season one and thought "nah, can't be the finale already". So I think some people are going to be caught by surprise, but then, it's streaming so watching on release date isn't as important as old broadcast TV anyway.
But I can say one thing - we've had 2 seasons now from Joel and Ellie's viewpoints. If we're still watching, we're emotionally invested. Season 3's focus starting on Abby has got a lot of mother-effing, heavy lifting to do to somehow make her sympathetic. I say this as someone who never played the games, just someone who's weighing Joel's rampage to save the teenager who became a daughter to him, plus Ellie pursuing semi-immediate revenge for the murder of the only father-figure she's known, against someone we don't really know's five year long obsessive pursuit of revenge for something she didn't witness. That's a hard sell for me.