I just played it , its not that bad. It's a 7/10 game. The AI aren't as bad as drive club. I did think the gfx was weak for a next gen game. Replays are very good apart from really , really annoying music. It's a game for true f1 fans, as its got issues such as lack of instance features like challenges etc.. You will only really get a challenge by taking on the entire 2015 /2014 season..
I've played worse games, also played better. I'm a big f1 fan there isn't a lot of choice for f1 games sadly. I'll play it, as not many racing games for ps4, project cars has it for gfx. F1 2015 was instantly playable with a pad... Really easy compared to project cars..
Oh well, maybe not for every one...