https://bugs.winehq.org/show_bug.cgi?id=42696
--- Comment #16 from Louis Cyfer cyfer3@googlemail.com --- as far I noticed wine-devel 2.6 doesn't include the patch mentioned in comment 8, comment 10 & comment 14 but is included in wine-staging 2.6 (as far the current updates on Ubuntu 16.04 goes with having the official repo added)
I assume it will be included in wine-devel 2.7, but current wine-staging runs flawless even with relative high settings (detail levels set), lightning 2.0 still has some issues through (no or wicked hair) but all in all STO is playable again with wine-staging 2.6 (assumed with including patch mentioned above)
Regards