Well, took a second spin and I'm less enchanted than I was at first blush.
I just took a stab and getting a Chaos Scar campaign done up. Now, adding the monsters? That's super, super easy. But, I tried to build the map for the Chaos Scar overland area and the first A1 module (Stick in the Mud) and WOW, does that blow. It took me forever to build those three maps (one for the general map, two for the module). And, they are NOT pretty. The lack of tiles really, really hurts here. Never mind the lack of token art.
I still haven't run a game on the VTT, so, I'm reserving judgement, but, given that Maptools would let me build those maps in about 30 seconds, any time saved by building tokens is pretty much washed out.