I found a fix (online) for this and it works after 20 hours of playing with 0 dc’s from 10+ a day before… involved deleting fmodex64.dllaudio file and adding a old one. But you must do this every time you launch the game since the game writes over it.
Friend with similar issues did this and had 0 dc’s in a 8-10 hour session from being unplayable (HC) before. 3rd friend just did this and will have results back tomorrow if hes still alive or not.
And you must play without sound, going from 10+ dc’s a day to 0 in 10-15 hour sessions over 2 days.
Cant post the file here. Hopefully blizz fixes.