I have noticed that there exists a branch of wine, that is more geared for multimedia and obviously supports pulse - and tries to improve audio in wine via some patches, PA and other improvements/fixes;
Archlinux package: https://aur.archlinux.org/packages.php?ID=52143
Wine-Multimedia git: http://repo.or.cz/w/wine/multimedia.git
I don't really know much about it, because for my own Wine usage i am using wine-rt - which is wine patched for RT / Jack audio connection kit usage. I am mainly running VSTs via FSThost with only the odd other (wine) audio app / utility, which wouldn't require using ALSA (directly) or PA, anyway. (Jackdbus is my soundserver (using ALSA backend).
anyway, i just thought i would post the wine-multimedia branch for those who might be interested.