The audio is broken, the improvements did improve the sound, but it is still far from good enough.
My best results (on PC), have been using Night-mode for dynamics and 3D-headphones in game, then use 'Windows Sonic' for spatial audio in Windows. This makes footsteps somehow usable. Dolby Atmos and DTS Headphone X, normally works much better but in BF6 they do not. Windows Sonic is not the best (has some reverb), but the stereo-mix seems even worse for footsteps.
But vehicles (tanks, helis, jeeps etc) are almost always silent, and simple sounds like the defibs charging does not work. The only thing that seems works to be jets, which often drown all other sounds...