I run Scion on Roll20 but it's largely just because of the sheets and the dice rollers. They allow everything to be easily stored within the game, along with fun images. The game isn't really built for set out grids. That's largely best left to theatre of the mind. Whereas D&D and similar games make 'where you are on the grid' tactically important, yeah, Kyman's pretty much nailed it on the head in the previous post about what Scion tactics largely look like.