Having spent many hours playing with the constant microstutter i have found a small section of the game that surprisingly runs perfectly smooth. Part of the campaign mission "shoot the messenger".

Stutters as usual while travelling to the arena, as soon as i enter through the air vent to sneak in it looks and feels like a whole different game as the microstutter goes away completely. After causing havoc in the arena taking out those few enemys further down the corridor was the most ive enjoyed the game in 35 hours of play.
Sadly after this you get a cutscene then spawn back outside the arena and stutter is back to business as usual.

Night and day difference with no microstutter.. is there any way i can repeat that mission to see if it is a repeatable event on my machine?
Anyone else with stutter found any part of the game that runs smooth? (excluding intros, menus, map and cutscenes)

if staff see this and think it would be usefull to pass on to the bug hunting team my system specs are also as follows.
i5 3570k, 8gb ram, R9 290, OS and game on SSD. Windows 8.1 and.latest amd 14.11.2 beta driver