Well, just play Vanilla when people are on online (which should be always), and then switch back to Median when no one is on. It's not hard; Median is fully compatible with patch 1.12. PlugY won't be or just about anything else, but as long as you keep a copy of the patch's mpq from 1.11, 1.12, and the newest version of Median in a separate "patches" folder, you should be fine. Not terribly difficult at all.