Just finished it and I have mostly the same criticisms as other people.
Firstly, the controls were too laggy and the new aiming mechanic feels terrible. Control of drake and shooting felt so lose it was like you were disconnected from Drake and this, more than anything, severely dampened my enjoyment of the game. I reckon I tried all the sensitivity settings. And what the hell with not being able to switch over which shoulder you want to look/shoot?
Second, the scripted bits; Among Thieves wasn't nearly as scripted as this. At times playing Drake's Deception felt like there were splinters of gameplay between scripted events, sometimes every few seconds which for me destroyed gameplay pacing.