Wine-Staging 1.9.3 has more than 116 new patches compared to the last release that featured the release notes. One of the big focuses recently by the Wine-Staging developers was on fixing compatibility with older games, including16-bit applications.
Wine-Staging 1.9.3 also has fixes for Qt environment variable handling and a number of other bug fixes.
More details on Wine-Staging 1.9.3 can be found via the Wine-Staging.com announcement. They also put out a complementary blog post about how Windows 3.1 / 16-bit apps work with Wine.