https://bugs.winehq.org/show_bug.cgi?id=38574
--- Comment #3 from Sebastian Lackner sebastian@fds-team.de --- (In reply to Jerome Leclanche from comment #2)
That'll be tough, the game can only be launched through the blizzard launcher, which forks.
For most apps this shouldn't matter, it makes interpreting the results a bit more difficult but besides that it should work - or did you already test that the output doesn't reach the terminal?
(Since multiple threads might be involved it might better to use WINEDEBUG=+seh,+tid then.)