I'll be adding some of the Advanced game rules into the next version of MEST Basic Game rules. Here's what I'm thinking will go in:
1. Suppression effects.
4. Knock-back, Knock-down, Prone
Another consideration - and this is a big change pending play-testing - is that we'll be consolidating the three-dice system (Modifier, Base, Wild) into a two-dice system (Base, Wild). The change should be negligible as far as game-play but of course it requires that I rework many of the traits, weapons, text, and example pictures in the Basic Game rules document.