The directional sound is much better for me in competitive games (CS:GO) I haven't tried the 3d mode yet ingame though!
You're saying the built in hrtf in cs go is better with the mobius in general compared to other headphones, correct? Should try setting csgo to 7.1 full range speakers, setting the Mobius to 7.1(8channel) and turning the Mobius' 3d on. Dont forget to set the room ambience and head measurements in the app though.