I've bought GR2 today. For now I'll not give the rate, because:
- AI lines doesn't appears in map editor when I try to draw bot's paths, so I cannot make maps without this important thing
- missing few cars from GR1 like Turbo or Yankee
- why color palette is such limited? RGB was giving momre freedom
- map editor is way better than in GR1 but there should be possibility to move objects up and down as well. You should also add few primitive shapes so people can make their own structures
- day and night time as well as weather would be amazing to set in our custom maps

So I'll pass with rating now and I'll wait. I think that adding few cars and fixing AI lines in map editor should not take longer than a month so I'll gie a rate in month ^^. Online multiplayer isn't that much important