One thing I think we'd see is a system that uses the same skill mechanics for combat and non-combat events.
Also, it'd be nice to see a way of handling sure kills that also allows for heroic battles. The two guys swinging away at each other with broadswords for hours is a standard fantasy trope. Fine. But then you get (in D&D) a villain who sneaks into the King's chambers and does... d4+str damage when he slams his knife into the heart of the sleeping king. Even a coup de grace isn't going to do much unless the king was low level and/or otherwise earlier injured.
Also, it'd be nice to see a way of handling sure kills that also allows for heroic battles. The two guys swinging away at each other with broadswords for hours is a standard fantasy trope. Fine. But then you get (in D&D) a villain who sneaks into the King's chambers and does... d4+str damage when he slams his knife into the heart of the sleeping king. Even a coup de grace isn't going to do much unless the king was low level and/or otherwise earlier injured.