I started this a few days ago. SR is my favorite new IP of this generation, and I spent nearly 200 hours on SR2. I was on a media blackout the entire time so I wasn't aware of how many features are missing in the third installment. I miss Freckle Bitch's, multiple layers of clothing, facial expression/walk animation, consumables, cut scenes before activities, secret areas, indoor environments, throw-able objects, crib customization, MP3 player, and so on. It runs and looks beautiful at 1080P on ultra, but I wish Volition stuck with Stillwater and the same engine, and just kept expanding onto what they already had; cramming as much content as possible. Steelport seems like a waste to me; nothing of interest to explore, and none of the personality of Stillwater with its Marina, Museum, and University districts and variety of pedestrians.
On the upside the driving feels great, the fluidity of movement and combat are even better than in SR2. It's too early to tell how the missions and story stand up to SR and SR2 for me. No Johnny sucks, of course. I'm still having fun, but it could've been so much more. Definitely my biggest disappointment of the year.