In D4 there are a lot of in-engine cutscenes which use the top-down camera. For some strange reason almost all of them use some kind of small camera movements. I understand that developers probably wanted to the refine those cutscenes by adding some cinematic camera shifts. This is wrong. The BEST solution to this kind of cutscenes is simply COPYING EXACT METHOD from D2:LoD. Again, they tried to change something, like in D3, without fully understanding why it was done best in D2:LoD.
Suggestion: All top-town in-engine cutscenes should NOT move camera AT ALL (like in D2:LoD) and during all such cutscenes my Necromancer minions should NOT despawn (again, like in D2:LoD).
This simple change will add to IMMERSION, simplify code and create a CONSISTENT cutscene system which will look LIKE IN DIABLO 2, ONLY BETTER, which D4 tries to achieve.