Same issue here. I play 39.5cm on CSGO, BF1 and BF4. Viewspeed matching hipfires feels too slow, cm/360 match feels too fast and I flick to the wrong spots. Most fights end up in shotgun fights too so using a 58cm (I think that's the viewspeed match from csgo to FN in my case) isn't really feasible, there's too much jumping and turning (for building) for it to be viable. This games settings are seriously frustrating, they don't even have a hold to crouch option which i've been using since I started pc gaming. Not to mention the poor sensitivity slider, poor crosshair and weird X/Y sens. I feel like my ability to aim up close in this game is half compared to other games lol. ADS feels alright since I have the viewspeed set to my BF1 hipfire, something like a 0.71 modifier for ADS.