Making FFAs less grindy

So FFAs, especially on already slow maps, on conquest, are pretty frustrating when somebody turtles like a madman especially with a defensive civ. Other than allowing wonders (which usually just lets the biggest turtle win) and king of the hill is there any way to make FFAs a bit less boring? It's kind of lame that the best play in FFAs is to try and rush your way into having two bases and then never aggro until everybody else is dead or exhausted.

Free resources for killing an opponent's buildings? A bit of food and wood for farms, a few hundred stone and gold for castles, etc? In a perfect world you'd maybe have people surrender to you and you get their base and money but I suspect this being human players that people would just be jerks for the hell of it and give everything away to another player.