Not a single crash thus far (24 hours played, according to Origin).
Framerate is quite decent - I'm running this on High/Ultra mix on GTX 660, and I'm above 30 (even 40) FPS 99% of the time (I do have some framerate drops when there are a lot of NPCs on screen). Sure, it's not perfect, but it's the card that's the equivalent of what's in PS4, and I can actually run the game on probably similar/higher(?) settings and with better framerate... (PS4 is 30 FPS locked).
All keys are rebindable, so I don't understand who's saying they aren't,
TacCam works quite poorly in the interiors (especially in narrow corridors) but it's servicable. It's not very good, but it's not terrible either. I'm using a mix of TacCam and normal mode during my Nightmare playthrough, and it works fairly well once you got hang of it.
There is unfortunately no auto-attack - you have to hold R button (rebindable) or LMB to attack (unless you're in TacCam). AI tactics are limited compared to what was present in DA2 - not that I mind, I disabled AI tactics in DA2, and I did the same thing here.
As to general thinking and strategizing during combat, Inquisition is far superior in this regard to both previous games, because you can actively use terrain, utilize a wide array of defensive abilities and position your party, which can make a huge difference (there are even passive abilities, which for example would give your archer damage bonus if he has a high ground).